fix(angular): ng add @ionic/angular in standalone projects (#28523)

Issue number: Resolves #28514

---------

<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->

<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

When using the `@ionic/angular` schematic in an Angular 17 project (`ng
add @ionic/angular`), developers will receive an error preventing the
schematic from running.

Additionally, the previous implementations of the schematic are out of
sync with the current state of the Ionic starters:
- `variables.css` is empty and missing Ionic's defaults
- `ionic.config.json` is not created
- Schematic does not have support for module vs. standalone projects.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- `ng add @ionic/angular` works with Angular 17 projects
- `ng add @ionic/angular` has fallback behavior for Angular 16 projects
using `AppModule`
- Schematics now includes the proper `variables.css` from Ionic starters
- Ionicons assets will no longer be copied when being added to a
standalone project
- Refactors a majority of the implementation to use the utilities that
come directly from `@angular-devkit/schematics` and
`@schematics/angular`.
- Sets the `@ionic/angular-toolkit` CLI configuration and schematics
configuration in the `angular.json`
- Creates missing `ionic.config.json`

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

Dev-build: `7.5.5-dev.11700239837.1925bbdb`

To test this PR:

1. Install Angular CLI v17 - `npm install -g @angular/cli@17`
2. Create a new project - `ng new angular-17`
3. Use the dev-build: - `ng add
@ionic/[email protected]`
4. Confirm the prompts
5. Validate that `provideIonicAngular({})` is added to the
`app.config.ts`
6. Validate that `ionic.config.json` was created
7. Validate that `angular.json` was updated with the
`@ionic/angular-devkit` configurations

Now verify legacy behavior:

1. Install Angular CLI v16 - `npm install -g @angular/cli@16`
2. Create a new project - `ng new angular-16`
3. Use the dev-build - `ng add
@ionic/[email protected]`
4. Confirm the prompts
5. Validate that `IonicModule.forRoot({})` is added to the
`app.module.ts`
8. Validate the ionicons glob pattern is added to the `angular.json`
9. Validate the `ionic.config.json` was created
10. Validate the `angular.json` was updated with the
`@ionic/angular-devkit` configurations

Author: sean-perkins

packages/angular/package-lock.json

@@ -61,11 +61,12 @@
     "zone.js": ">=0.11.0"
   },
   "devDependencies": {
-    "@angular-devkit/core": "^14.0.0",
-    "@angular-devkit/schematics": "^14.0.0",
+    "@angular-devkit/core": "^17.0.0",
+    "@angular-devkit/schematics": "^17.0.0",
     "@angular-eslint/eslint-plugin": "^14.0.0",
     "@angular-eslint/eslint-plugin-template": "^14.0.0",
     "@angular-eslint/template-parser": "^14.0.0",
+    "@angular/cli": "^14.0.0",
     "@angular/common": "^14.0.0",
     "@angular/compiler": "^14.0.0",
     "@angular/compiler-cli": "^14.0.0",
@@ -76,7 +77,7 @@
     "@angular/router": "^14.0.0",
     "@ionic/eslint-config": "^0.3.0",
     "@ionic/prettier-config": "^2.0.0",
-    "@schematics/angular": "^14.0.0",
+    "@schematics/angular": "^17.0.0",
     "@types/node": "12.12.5",
     "@typescript-eslint/eslint-plugin": "^5.0.0",
     "@typescript-eslint/parser": "^5.0.0",

packages/angular/package.json

@@ -4,3 +4,244 @@
 
 /* To quickly generate your own theme, check out the color generator */
 /* https://ionicframework.com/docs/theming/color-generator */
+
+/** Ionic CSS Variables **/
+:root {
+  /** primary **/
+  --ion-color-primary: #3880ff;
+  --ion-color-primary-rgb: 56, 128, 255;
+  --ion-color-primary-contrast: #ffffff;
+  --ion-color-primary-contrast-rgb: 255, 255, 255;
+  --ion-color-primary-shade: #3171e0;
+  --ion-color-primary-tint: #4c8dff;
+
+  /** secondary **/
+  --ion-color-secondary: #3dc2ff;
+  --ion-color-secondary-rgb: 61, 194, 255;
+  --ion-color-secondary-contrast: #ffffff;
+  --ion-color-secondary-contrast-rgb: 255, 255, 255;
+  --ion-color-secondary-shade: #36abe0;
+  --ion-color-secondary-tint: #50c8ff;
+
+  /** tertiary **/
+  --ion-color-tertiary: #5260ff;
+  --ion-color-tertiary-rgb: 82, 96, 255;
+  --ion-color-tertiary-contrast: #ffffff;
+  --ion-color-tertiary-contrast-rgb: 255, 255, 255;
+  --ion-color-tertiary-shade: #4854e0;
+  --ion-color-tertiary-tint: #6370ff;
+
+  /** success **/
+  --ion-color-success: #2dd36f;
+  --ion-color-success-rgb: 45, 211, 111;
+  --ion-color-success-contrast: #ffffff;
+  --ion-color-success-contrast-rgb: 255, 255, 255;
+  --ion-color-success-shade: #28ba62;
+  --ion-color-success-tint: #42d77d;
+
+  /** warning **/
+  --ion-color-warning: #ffc409;
+  --ion-color-warning-rgb: 255, 196, 9;
+  --ion-color-warning-contrast: #000000;
+  --ion-color-warning-contrast-rgb: 0, 0, 0;
+  --ion-color-warning-shade: #e0ac08;
+  --ion-color-warning-tint: #ffca22;
+
+  /** danger **/
+  --ion-color-danger: #eb445a;
+  --ion-color-danger-rgb: 235, 68, 90;
+  --ion-color-danger-contrast: #ffffff;
+  --ion-color-danger-contrast-rgb: 255, 255, 255;
+  --ion-color-danger-shade: #cf3c4f;
+  --ion-color-danger-tint: #ed576b;
+
+  /** dark **/
+  --ion-color-dark: #222428;
+  --ion-color-dark-rgb: 34, 36, 40;
+  --ion-color-dark-contrast: #ffffff;
+  --ion-color-dark-contrast-rgb: 255, 255, 255;
+  --ion-color-dark-shade: #1e2023;
+  --ion-color-dark-tint: #383a3e;
+
+  /** medium **/
+  --ion-color-medium: #92949c;
+  --ion-color-medium-rgb: 146, 148, 156;
+  --ion-color-medium-contrast: #ffffff;
+  --ion-color-medium-contrast-rgb: 255, 255, 255;
+  --ion-color-medium-shade: #808289;
+  --ion-color-medium-tint: #9d9fa6;
+
+  /** light **/
+  --ion-color-light: #f4f5f8;
+  --ion-color-light-rgb: 244, 245, 248;
+  --ion-color-light-contrast: #000000;
+  --ion-color-light-contrast-rgb: 0, 0, 0;
+  --ion-color-light-shade: #d7d8da;
+  --ion-color-light-tint: #f5f6f9;
+}
+
+@media (prefers-color-scheme: dark) {
+  /*
+   * Dark Colors
+   * -------------------------------------------
+   */
+
+  body {
+    --ion-color-primary: #428cff;
+    --ion-color-primary-rgb: 66, 140, 255;
+    --ion-color-primary-contrast: #ffffff;
+    --ion-color-primary-contrast-rgb: 255, 255, 255;
+    --ion-color-primary-shade: #3a7be0;
+    --ion-color-primary-tint: #5598ff;
+
+    --ion-color-secondary: #50c8ff;
+    --ion-color-secondary-rgb: 80, 200, 255;
+    --ion-color-secondary-contrast: #ffffff;
+    --ion-color-secondary-contrast-rgb: 255, 255, 255;
+    --ion-color-secondary-shade: #46b0e0;
+    --ion-color-secondary-tint: #62ceff;
+
+    --ion-color-tertiary: #6a64ff;
+    --ion-color-tertiary-rgb: 106, 100, 255;
+    --ion-color-tertiary-contrast: #ffffff;
+    --ion-color-tertiary-contrast-rgb: 255, 255, 255;
+    --ion-color-tertiary-shade: #5d58e0;
+    --ion-color-tertiary-tint: #7974ff;
+
+    --ion-color-success: #2fdf75;
+    --ion-color-success-rgb: 47, 223, 117;
+    --ion-color-success-contrast: #000000;
+    --ion-color-success-contrast-rgb: 0, 0, 0;
+    --ion-color-success-shade: #29c467;
+    --ion-color-success-tint: #44e283;
+
+    --ion-color-warning: #ffd534;
+    --ion-color-warning-rgb: 255, 213, 52;
+    --ion-color-warning-contrast: #000000;
+    --ion-color-warning-contrast-rgb: 0, 0, 0;
+    --ion-color-warning-shade: #e0bb2e;
+    --ion-color-warning-tint: #ffd948;
+
+    --ion-color-danger: #ff4961;
+    --ion-color-danger-rgb: 255, 73, 97;
+    --ion-color-danger-contrast: #ffffff;
+    --ion-color-danger-contrast-rgb: 255, 255, 255;
+    --ion-color-danger-shade: #e04055;
+    --ion-color-danger-tint: #ff5b71;
+
+    --ion-color-dark: #f4f5f8;
+    --ion-color-dark-rgb: 244, 245, 248;
+    --ion-color-dark-contrast: #000000;
+    --ion-color-dark-contrast-rgb: 0, 0, 0;
+    --ion-color-dark-shade: #d7d8da;
+    --ion-color-dark-tint: #f5f6f9;
+
+    --ion-color-medium: #989aa2;
+    --ion-color-medium-rgb: 152, 154, 162;
+    --ion-color-medium-contrast: #000000;
+    --ion-color-medium-contrast-rgb: 0, 0, 0;
+    --ion-color-medium-shade: #86888f;
+    --ion-color-medium-tint: #a2a4ab;
+
+    --ion-color-light: #222428;
+    --ion-color-light-rgb: 34, 36, 40;
+    --ion-color-light-contrast: #ffffff;
+    --ion-color-light-contrast-rgb: 255, 255, 255;
+    --ion-color-light-shade: #1e2023;
+    --ion-color-light-tint: #383a3e;
+  }
+
+  /*
+   * iOS Dark Theme
+   * -------------------------------------------
+   */
+
+  .ios body {
+    --ion-background-color: #000000;
+    --ion-background-color-rgb: 0, 0, 0;
+
+    --ion-text-color: #ffffff;
+    --ion-text-color-rgb: 255, 255, 255;
+
+    --ion-color-step-50: #0d0d0d;
+    --ion-color-step-100: #1a1a1a;
+    --ion-color-step-150: #262626;
+    --ion-color-step-200: #333333;
+    --ion-color-step-250: #404040;
+    --ion-color-step-300: #4d4d4d;
+    --ion-color-step-350: #595959;
+    --ion-color-step-400: #666666;
+    --ion-color-step-450: #737373;
+    --ion-color-step-500: #808080;
+    --ion-color-step-550: #8c8c8c;
+    --ion-color-step-600: #999999;
+    --ion-color-step-650: #a6a6a6;
+    --ion-color-step-700: #b3b3b3;
+    --ion-color-step-750: #bfbfbf;
+    --ion-color-step-800: #cccccc;
+    --ion-color-step-850: #d9d9d9;
+    --ion-color-step-900: #e6e6e6;
+    --ion-color-step-950: #f2f2f2;
+
+    --ion-item-background: #000000;
+
+    --ion-card-background: #1c1c1d;
+  }
+
+  .ios ion-modal {
+    --ion-background-color: var(--ion-color-step-100);
+    --ion-toolbar-background: var(--ion-color-step-150);
+    --ion-toolbar-border-color: var(--ion-color-step-250);
+  }
+
+  /*
+   * Material Design Dark Theme
+   * -------------------------------------------
+   */
+
+  .md body {
+    --ion-background-color: #121212;
+    --ion-background-color-rgb: 18, 18, 18;
+
+    --ion-text-color: #ffffff;
+    --ion-text-color-rgb: 255, 255, 255;
+
+    --ion-border-color: #222222;
+
+    --ion-color-step-50: #1e1e1e;
+    --ion-color-step-100: #2a2a2a;
+    --ion-color-step-150: #363636;
+    --ion-color-step-200: #414141;
+    --ion-color-step-250: #4d4d4d;
+    --ion-color-step-300: #595959;
+    --ion-color-step-350: #656565;
+    --ion-color-step-400: #717171;
+    --ion-color-step-450: #7d7d7d;
+    --ion-color-step-500: #898989;
+    --ion-color-step-550: #949494;
+    --ion-color-step-600: #a0a0a0;
+    --ion-color-step-650: #acacac;
+    --ion-color-step-700: #b8b8b8;
+    --ion-color-step-750: #c4c4c4;
+    --ion-color-step-800: #d0d0d0;
+    --ion-color-step-850: #dbdbdb;
+    --ion-color-step-900: #e7e7e7;
+    --ion-color-step-950: #f3f3f3;
+
+    --ion-item-background: #1e1e1e;
+
+    --ion-toolbar-background: #1f1f1f;
+
+    --ion-tab-bar-background: #1f1f1f;
+
+    --ion-card-background: #1e1e1e;
+  }
+}
+
+html {
+  /*
+   * For more information on dynamic font scaling, visit the documentation:
+   * https://ionicframework.com/docs/layout/dynamic-font-scaling
+   */
+  --ion-dynamic-font: var(--ion-default-dynamic-font);
+}