Create validation.yml

.github/workflows/validation.yml

@@ -0,0 +1,18 @@
+name: Validation
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened, ready_for_review, review_requested] # https://bit.ly/3FEj9D4
+    branches: [master, main]
+
+jobs:
+  check-user-star:
+    name: Check Star
+    runs-on: ubuntu-latest
+    steps:
+      - {uses: gacts/is-stargazer@v1, with: {username: '${{ github.event.pull_request.user.login }}'}, id: check-star}
+
+      - if: steps.check-star.outputs.is-stargazer != 'true'
+        uses: actions/github-script@v6
+        with:
+          script: core.setFailed('⭐ Please star this repository!')