adding action for stale pr's

.github/workflows/stales.yml

@@ -0,0 +1,21 @@
+name: "Close stale issues and PRs"
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # Daily
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v7
+        with:
+          days-before-stale: 30
+          days-before-close: 7
+          stale-issue-message: "This issue has been automatically marked as stale due to inactivity."
+          stale-pr-message: "This PR has been automatically marked as stale due to inactivity."
+          close-issue-message: "Closing this issue due to prolonged inactivity."
+          close-pr-message: "Closing this PR due to prolonged inactivity."
+          exempt-issue-labels: "keep-open"
+          exempt-pr-labels: "keep-open"
+          only: "pulls"