Create Stale Issue Action

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: "15 16 * * *"
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/stale@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'There has been no activity on this issue for an extended period of time. This issue will be closed after further 14 days of inactivity.'
+        stale-pr-message: 'There has been no activity on this Pull Request for an extended period of time. This Pull Request will be closed after further 14 days of inactivity.'
+        stale-issue-label: 'stale'
+        stale-pr-label: 'stale'
+        exempt-issue-label: 'leave open'
+        exempt-pr-label: 'leave open'
+        days-before-stale: 90
+        days-before-close: 14
+        operations-per-run: 7