ci: Added a stale issue/pr workflow

.github/workflows/stale.yml

@@ -0,0 +1,27 @@
+name: "Stale issue and PR workflow"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v4
+        with:
+          stale-issue-message: >
+            This issue has been automatically marked as stale because it has not had
+            activity in the last 30 days. It will be closed if no further activity occurs. 
+            Thank you for your contributions.
+          stale-pr-message: >
+            This pull request has been automatically marked as stale because it has not had
+            activity in the last 30 days. It will be closed if no further activity occurs. Thank you
+            for your contributions.
+          days-before-stale: 30
+          days-before-close: 10
+          close-issue-label: "abandoned"