chore(github): Add action to close all pull requests

Author: klausi

.github/workflows/auto-close.yml renamed to .github/workflows/close-issues.yml

@@ -1,6 +1,9 @@
+name: Close all issues
+
 on:
   issues:
     types: [opened]
+
 jobs:
   closeAll:
     runs-on: ubuntu-latest

.github/workflows/close-pull-requests.yml

@@ -0,0 +1,16 @@
+name: Close all pull requests
+
+on:
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: superbrothers/close-pull-request@v3
+      with:
+        comment: |
+          Please open issues and pull requests on drupal.org: https://www.drupal.org/project/issues/graphql
+          Auto-closing this pull request.
+