refactor(core): add REQUEST, RESPONSE_INIT and REQUEST_CONTEXT tokens

This commit introduces the `REQUEST`, `RESPONSE_INIT` and `REQUEST_CONTEXT` tokens, which will replace similar ones from https://github.com/angular/angular-cli/blob/28503186230b5e22b84499641d56c9c981fdab1d/packages/angular/ssr/tokens/src/tokens.ts, so those tokens would be imported in application code via `@angular/core` package.

Author: jelbourn

adev/src/content/api-examples/router/testing/test/router_testing_harness_examples.spec.ts

@@ -15,7 +15,7 @@ import {RouterTestingHarness} from '@angular/router/testing';
 describe('navigate for test examples', () => {
   // #docregion RoutedComponent
   it('navigates to routed component', async () => {
-    @Component({standalone: true, template: 'hello {{name}}'})
+    @Component({template: 'hello {{name}}'})
     class TestCmp {
       name = 'world';
     }
@@ -32,9 +32,9 @@ describe('navigate for test examples', () => {
   // #enddocregion
 
   it('testing a guard', async () => {
-    @Component({standalone: true, template: ''})
+    @Component({template: ''})
     class AdminComponent {}
-    @Component({standalone: true, template: ''})
+    @Component({template: ''})
     class LoginComponent {}
 
     // #docregion Guard

adev/src/content/best-practices/style-guide.md

@@ -2,7 +2,6 @@ import {Component} from '@angular/core';
 import {ExampleProgressbarComponent} from './progress-bar.component';
 
 @Component({
-  standalone: true,
   selector: 'app-root',
   templateUrl: './app.component.html',
   styleUrls: ['./app.component.css'],

adev/src/content/examples/accessibility/src/app/app.component.ts

@@ -6,7 +6,6 @@ import {Component, Input} from '@angular/core';
  * Example progressbar component.
  */
 @Component({
-  standalone: true,
   selector: 'app-example-progressbar',
   template: '<div class="bar" [style.width.%]="value"></div>',
   styleUrls: ['./progress-bar.component.css'],

adev/src/content/examples/accessibility/src/app/progress-bar.component.ts

@@ -1,7 +1,6 @@
 import {Component} from '@angular/core';
 
 @Component({
-  standalone: true,
   selector: 'app-root',
   templateUrl: './app.component.html',
   styleUrls: ['./app.component.css'],

adev/src/content/examples/angular-compiler-options/src/app/app.component.ts

@@ -1,7 +1,6 @@
 import {Component} from '@angular/core';
 
 @Component({
-  standalone: true,
   selector: 'app-about',
   templateUrl: './about.component.html',
   styleUrls: ['./about.component.css'],

adev/src/content/examples/animations/src/app/about.component.ts

@@ -16,7 +16,6 @@ import {slideInAnimation} from './animations';
 
 // #docregion decorator, toggle-app-animations, define
 @Component({
-  standalone: true,
   selector: 'app-root',
   templateUrl: 'app.component.html',
   styleUrls: ['app.component.css'],

adev/src/content/examples/animations/src/app/app.component.ts

@@ -3,7 +3,6 @@ import {HEROES} from './mock-heroes';
 import {HeroListAutoComponent} from './hero-list-auto.component';
 
 @Component({
-  standalone: true,
   selector: 'app-hero-list-auto-page',
   template: `
     <section>

adev/src/content/examples/animations/src/app/hero-list-auto-page.component.ts

@@ -5,7 +5,6 @@ import {Hero} from './hero';
 import {NgFor} from '@angular/common';
 
 @Component({
-  standalone: true,
   selector: 'app-hero-list-auto',
   templateUrl: 'hero-list-auto.component.html',
   styleUrls: ['./hero-list-page.component.css'],

adev/src/content/examples/animations/src/app/hero-list-auto.component.ts

@@ -3,7 +3,6 @@ import {HEROES} from './mock-heroes';
 import {HeroListEnterLeaveComponent} from './hero-list-enter-leave.component';
 
 @Component({
-  standalone: true,
   selector: 'app-hero-list-enter-leave-page',
   template: `
     <section>