Add summary workflow that waits for all triggered status checks

.github/workflows/summary.yaml

@@ -0,0 +1,15 @@
+name: Summary
+on:
+  pull_request:
+    branches:
+      - main
+jobs:
+  wait-for-triggered-checks:
+    runs-on: ubuntu-latest
+    permissions:
+      checks: read
+    steps:
+      - name: Wait for all triggered status checks
+        uses: poseidon/wait-for-status-checks@v0.5.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}