Create stale.yml

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: '0 15 * * *'
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+    - uses: actions/stale@v9
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue has been marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs.'
+        stale-pr-message: 'This pull request has been marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs.'
+        stale-pr-label: 'stale'
+        days-before-stale: 180
+        days-before-close: 14
+        exempt-all-milestones: true