Add workflow to regenerate the workflow manifest

.github/workflows/regenerate-manifest.yml

@@ -0,0 +1,78 @@
+name: Regenerate Manifest
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  regenerate-manifest:
+    name: Regenerate manifest
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out source code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+
+      - name: Set up PHP environment
+        uses: shivammathur/setup-php@7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc # v2
+        with:
+          php-version: 'latest'
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install Composer dependencies & cache dependencies
+        uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # v4
+
+      - name: Install WP-CLI
+        run: |
+          curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli-nightly.phar
+          sudo mv wp-cli-nightly.phar /usr/local/bin/wp
+          sudo chmod +x /usr/local/bin/wp
+
+      - name: Generate handbook manifest
+        run: wp handbook gen-hb-manifest
+        env:
+          WP_CLI_CONFIG_PATH: /dev/null
+
+      - name: Commit and Create Pull Request
+        env:
+          GH_TOKEN: ${{ github.token }}
+          PR_BODY: |
+            **This is an automated pull-request**
+
+            Updates the `bin/handbook-manifest.json` file with the latest changes.
+        run: |
+          if [ -n "$(git status --porcelain)" ]; then
+            git config user.name "github-actions[bot]"
+            git config user.email "github-actions[bot]@users.noreply.github.com"
+            git checkout -b update-handbook-manifest
+            git add bin/handbook-manifest.json
+            git commit -m "Regenerate handbook manifest"
+            git push --force-with-lease origin update-handbook-manifest
+
+            PR_NUMBER=$(gh pr list --head update-handbook-manifest --json number --jq '.[0].number // empty')
+            if [ -z "$PR_NUMBER" ]; then
+              gh pr create \
+                --title "Update handbook manifest" \
+                --body "$PR_BODY" \
+                --label "scope:distribution" \
+                --base "${{ github.event.repository.default_branch }}" \
+                --head "update-handbook-manifest" \
+                --reviewer "swissspidy"
+            else
+              gh pr edit "$PR_NUMBER" \
+                --title "Update handbook manifest" \
+                --body "$PR_BODY" \
+                --add-label "scope:distribution" \
+                --base "${{ github.event.repository.default_branch }}"
+            fi
+          fi