Add GH action to enforce PR labels (#52760)

* Add GH action to enforce PR labels

* Update enforce-pr-labels.yml

* Update enforce-pr-labels.yml

* Update enforce-pr-labels.yml

.github/workflows/enforce-pr-labels.yml

@@ -0,0 +1,18 @@
+name: Enforce labels on Pull Request
+on:
+  pull_request:
+    types: [opened, labeled, unlabeled, synchronize]
+jobs:
+  type-related-labels:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: mheap/github-action-required-labels@v5
+        with:
+          mode: exactly
+          count: 1
+          labels: "[Type] Accessibility (a11y), [Type] Automated Testing, [Type] Breaking Change, [Type] Bug, [Type] Build Tooling, [Type] Code Quality, [Type] Copy, [Type] Developer Documentation, [Type] Enhancement, [Type] Experimental, [Type] Feature, [Type] New API, [Type] Task, [Type] Performance, [Type] Project Management, [Type] Security, [Type] WP Core Ticket"
+          add_comment: true
+          message: "## ⚠️ Type of PR label error\n To merge this PR, it requires {{ errorString }} {{ count }} label indicating the type of PR. Other labels are optional and not being checked here. \n- **Type-related labels to choose from**: {{ provided }}.\n- **Labels found**: {{ applied }}."