Add PR label workflow

.github/workflows/label-prs.yml

@@ -0,0 +1,26 @@
+name: Auto Label PRs
+
+on:
+  pull_request:
+    types: [review_requested, synchronize, reopened]
+  issue_comment:
+    types: [created]
+
+jobs:
+  update-labels:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Remove 'waiting for changes' and Add 'waiting for review' label
+        uses: actions-ecosystem/action-add-labels@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          labels: waiting for review
+
+      - name: Remove 'waiting for changes' label if exists
+        run: |
+          if gh pr view ${{ github.event.pull_request.number }} --json labels --jq '.labels[].name' | grep -q 'waiting for changes'; then
+            gh pr edit ${{ github.event.pull_request.number }} --remove-label "waiting for changes"
+          fi