chore: migrate from deprecated stale bot app to GitHub Actions stale action

.github/workflows/stale.yaml

@@ -0,0 +1,31 @@
+name: "Close stale issues and PRs"
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # Run daily at midnight UTC
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@95d9a5deda9de15063e7595e9719c11c38c90ae2 # v2.13.2
+        with:
+          egress-policy: audit
+
+      - uses: actions/stale@5f858e3efba33a5ca4407a664cc011ad407f2008 # v10.1.0
+        with:
+          days-before-stale: 60
+          days-before-close: 14
+          stale-issue-label: 'stale'
+          stale-pr-label: 'stale'
+          exempt-issue-labels: 'pinned,security,triaged'
+          exempt-pr-labels: 'pinned,security,triaged'
+          stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.'
+          stale-pr-message: 'This PR has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.'
+          close-issue-message: ''
+          close-pr-message: ''