[ci] add autocloser workflow to deleegate to ecs-src

Author: TomasVotruba

.github/workflows/auto_closer.yaml

@@ -0,0 +1,14 @@
+name: Auto Closer PR
+
+on:
+    pull_request_target:
+        types: [opened]
+
+jobs:
+    run:
+        runs-on: ubuntu-latest
+
+        steps:
+          - uses: superbrothers/close-pull-request@v3
+            with:
+            comment: "This repository content is generated by easy-coding-standard/ecs-src. Please open pull request in [easy-coding-standard/ecs-src](https://github.com/easy-coding-standard/ecs-src)."