add stale issue and pr workflow

.github/workflows/automate_stale.yml

@@ -0,0 +1,31 @@
+name: Close Stale Issues and PRs Automatically
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '*/10 * * * *' # run every 10 minutes as it also removes labels.
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v4.1.1
+        id: stale
+        with:
+          stale-issue-message: >
+            This issue has been automatically marked as stale because it has not had
+            recent activity. It will be closed if no further activity occurs. Thank you
+            for your contributions.
+          days-before-issue-stale: 60
+          days-before-issue-close: 7
+          exempt-issue-labels: after-vacations,will-fix
+          stale-issue-label: stale
+          stale-pr-message: >
+            This PR has been automatically marked as stale because it has not had
+            recent activity from the author. It will be closed if no further activity occurs.
+            If the PR was closed and you want it re-opened, let us know
+            and we'll re-open the PR so that you can continue the contribution!
+          days-before-pr-stale: 14
+          days-before-pr-close: 7
+          exempt-pr-labels: after-vacations,will-fix
+          stale-pr-label: stale
+          operations-per-run: 100