feat: add catch-all PR job that depends on all other checks

Co-authored-by: Saadnajmi <6722175+Saadnajmi@users.noreply.github.com>

Author: Copilot

.github/workflows/pr.yml

@@ -302,3 +302,18 @@ jobs:
       - name: Test markdown links
         run: |
           find . -name \*.md -not -name CHANGELOG.md -not -path '*/node_modules/*' -print0 | xargs -0 -n1 yarn test-links -c $(pwd)/.ado/markdown-link-check-config.json
+
+  pr:
+    name: PR
+    runs-on: ubuntu-latest
+    needs:
+      - js
+      - android
+      - macos
+      - ios
+      - windows
+      - win32
+      - test-links
+    steps:
+      - name: All required jobs passed
+        run: echo "All required jobs completed."