ci: add require multiple reviewers action

.gitattributes

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+* text=auto eol=lf
+
+**/dist/** -diff linguist-generated=true

.github/actions/require-multiple-reviewers-v1/README.md

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+# require-multiple-reviewers-v1
+
+A GitHub Action that requires multiple reviewers for important files
+
+## Inputs
+
+| Name                   | Required | Description                                                                                                                              | Default |
+| ---------------------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------- | ------- |
+| `token`                | Yes      | A GitHub token with the [required permissions](#permissions)                                                                             | NA      |
+| `number-of-reviewers`  | Yes      | The number of reviewers required.                                                                                                        | 2       |
+| `important-files-path` | Yes      | The path to the file containing a list of important files. It should comply with [gitignore syntax](https://git-scm.com/docs/gitignore). | NA      |
+
+## Example usage
+
+```yaml
+name: Require multiple reviewers
+
+jobs:
+  require-multiple-reviewers:
+    runs-on: ubuntu-latest
+    timeout-minutes: 2
+    permissions:
+      pull-requests: read
+      contents: read
+      checks: write
+    steps:
+      - name: Require two reviewers for important files
+        uses: dequelabs/axe-api-team-public/.github/actions/require-multiple-reviewers-v1@main
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          number-of-reviewers: 2
+          important-files-path: .github/important-files.txt
+```
+
+## Permissions
+
+This action requires the following permission scopes:
+
+- `pull-requests: read` - To get pull request reviews.
+- `contents: read` - To read the contents of the repository, including the changed and important files.
+- `checks: write` - To create and update check runs with the results of the action.

.github/actions/require-multiple-reviewers-v1/action.yml

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+name: Require multiple reviewers
+description: Require multiple reviewers for important files
+
+# Define your inputs here.
+inputs:
+  token:
+    description: 'A GitHub token with the required permissions'
+    required: true
+  number-of-reviewers:
+    description: 'The number of reviewers required.'
+    required: true
+    default: '2'
+  important-files-path:
+    description: 'The path to the file containing a list of important files (gitignore syntax supported).'
+    required: true
+
+runs:
+  using: node20
+  main: dist/index.js