feat: improve merge-check action to leave a comment and label to PRs

.github/workflows/merge-check.yml

@@ -1,8 +1,12 @@
 name: Check Merge Fast-Forward Only
 
+permissions:
+  pull-requests: write
+
 on:
-  push:
+  - push
-  pull_request:
+  - pull_request_target
+  - pull_request_review
 
 jobs:
   check_merge:
@@ -27,3 +31,17 @@ jobs:
           else
             git merge --ff-only ${{ github.sha }}
           fi
+
+      - name: add labels
+        uses: actions-ecosystem/action-add-labels@v1
+        if: failure()
+        with:
+          labels: |
+            needs rebase
+
+      - name: comment
+        uses: mshick/add-pr-comment@v2
+        if: failure()
+        with:
+          message: |
+            This pull request has conflicts, please rebase.