Add PR label action

.github/workflows/require_label.yml

@@ -0,0 +1,59 @@
+name: Pull Request Labels
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+
+jobs:
+  check-labels:
+    runs-on: ubuntu-latest
+    env:
+      GH_TOKEN: ${{ github.token }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check for Pull Request Labels
+        run: |
+          REQUIRED_LABELS=("documentation" "bugfix" "chore" "enhancement" "ignore-for-release" "security" "sorbet")
+          LABELS=$(gh pr view --json labels --jq ".labels[] .name" ${{ github.event.pull_request.number }})
+
+          errorMessage=""
+          if [ -z "$LABELS" ]; then
+            echo "No labels found on PR"
+            errorMessage="No labels found on PR"
+          else
+            matched=0
+            for label in $LABELS; do
+              if [[ "${REQUIRED_LABELS[@]}" =~ "${label}" ]]; then
+                matched=1
+                echo "Matched label: `$label`"
+                break
+              fi
+            done
+
+            if [ $matched -eq 0 ]; then
+              echo "No matching required labels found on PR"
+              errorMessage="No matching required labels found on PR"
+            fi
+          fi
+
+          if [ -n "$errorMessage" ]; then
+            echo "### Pull Request Labels                                     "  > comment.md
+            echo "                                                            " >> comment.md
+            echo 'Error: `'$errorMessage'`'"                                  " >> comment.md
+            echo "                                                            " >> comment.md
+            echo "Please add one of the following labels to your pull request:" >> comment.md
+            echo '`'"${REQUIRED_LABELS[@]}"'`'"                               " >> comment.md
+            echo "                                                            " >> comment.md
+
+            gh pr comment ${{ github.event.pull_request.number }} --body-file comment.md --edit-last || \
+              gh pr comment ${{ github.event.pull_request.number }} --body-file comment.md
+            exit 1
+          else
+            echo "All required labels found on PR"
+            commentId=$(gh pr view -c --json comments --jq ".comments | reverse[] | select(.viewerDidAuthor == true) | .id" ${{ github.event.pull_request.number }})
+            if [ -n "$commentId" ]; then
+              echo "Deleting previous comment: /repos/${{ github.repository }}/issues/comments/$commentId"
+              gh api graphql -f query="mutation {deleteIssueComment(input: { id: \"$commentId\" })  { clientMutationId }}" || true
+            fi
+          fi
+        shell: bash