feat: add require-packageManager rule (#1620)

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## PR Checklist

- [x] Addresses an existing open issue: fixes #1546
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/michaelfaith/eslint-plugin-package-json/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/michaelfaith/eslint-plugin-package-json/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

This change adds a new rule to require the `packageManager` property is
present.

Author: michaelfaith

.github/workflows/ci.yml

@@ -68,10 +68,11 @@ jobs:
           node-version: ${{ matrix.node-version }}
       - run: pnpm install -D eslint@${{ matrix.eslint-version }}
       - run: pnpm run test --coverage
-      - env:
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      - uses: codecov/codecov-action@v5
         if: always()
-        uses: codecov/codecov-action@v5
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
   type_check:
     name: Type Check (ESLint ${{ matrix.eslint-version }})
     runs-on: ubuntu-latest

README.md

@@ -230,6 +230,7 @@ The default settings don't conflict, and Prettier plugins can quickly fix up ord
 | [require-license](docs/rules/require-license.md)                           | Requires the `license` property to be present.                                                                                                                                               | ✔️ ✅ 📦 |    |    |    |
 | [require-name](docs/rules/require-name.md)                                 | Requires the `name` property to be present.                                                                                                                                                  | ✔️ ✅ 📦 |    |    |    |
 | [require-optionalDependencies](docs/rules/require-optionalDependencies.md) | Requires the `optionalDependencies` property to be present.                                                                                                                                  |         |    |    |    |
+| [require-packageManager](docs/rules/require-packageManager.md)             | Requires the `packageManager` property to be present.                                                                                                                                        |         |    |    |    |
 | [require-peerDependencies](docs/rules/require-peerDependencies.md)         | Requires the `peerDependencies` property to be present.                                                                                                                                      |         |    |    |    |
 | [require-repository](docs/rules/require-repository.md)                     | Requires the `repository` property to be present.                                                                                                                                            | ✔️ ✅ 📦 |    |    |    |
 | [require-scripts](docs/rules/require-scripts.md)                           | Requires the `scripts` property to be present.                                                                                                                                               |         |    |    |    |

docs/rules/require-packageManager.md

@@ -0,0 +1,82 @@
+# require-packageManager
+
+<!-- end auto-generated rule header -->
+
+This rule checks for the existence of the `packageManager` property in a package.json, and reports a violation if it doesn't exist.
+
+Example of **incorrect** code for this rule:
+
+```json
+{
+	"name": "thee-silver-mt-zion",
+	"version": "13.0.0"
+}
+```
+
+Example of **correct** code for this rule:
+
+```json
+{
+	"name": "thee-silver-mt-zion",
+	"version": "13.0.0",
+	"packageManager": "pnpm@10.30.0"
+}
+```
+
+## Options
+
+<!-- begin auto-generated rule options list -->
+
+| Name            | Description                                                                                 | Type    | Default |
+| :-------------- | :------------------------------------------------------------------------------------------ | :------ | :------ |
+| `ignorePrivate` | Determines if this rule should be enforced when the package's `private` property is `true`. | Boolean | `false` |
+
+<!-- end auto-generated rule options list -->
+
+```json
+{
+	"package-json/require-packageManager": [
+		"error",
+		{
+			"ignorePrivate": true
+		}
+	]
+}
+```
+
+Example of **incorrect** code for this rule with the `{ "ignorePrivate": false }` option:
+
+```json
+{
+	"private": true
+}
+```
+
+Example of **correct** code for this rule with the `{ "ignorePrivate": false }` option:
+
+```json
+{
+	"private": true,
+	"packageManager": "pnpm@10.30.0"
+}
+```
+
+Example of **incorrect** code for this rule with the `{ "ignorePrivate": true }` option:
+
+```json
+{
+	"private": false
+}
+```
+
+```json
+{}
+```
+
+Example of **correct** code for this rule with the `{ "ignorePrivate": true }` option:
+
+```json
+{
+	"private": true
+}
+```

src/rules/require-properties.ts

@@ -21,6 +21,7 @@ export const propertyConfig: [
 	["license", { ignorePrivateDefault: true, isRecommended: true }],
 	["name", { ignorePrivateDefault: true, isRecommended: true }],
 	["optionalDependencies"],
+	["packageManager"],
 	["peerDependencies"],
 	["repository", { ignorePrivateDefault: true, isRecommended: true }],
 	["scripts"],