build: replace the stale app with gh-actions

The stale app is deprecated and  no longer maintained

Author: cotes2020

.github/stale.yml

@@ -0,0 +1,30 @@
+name: "Close stale issues and PRs"
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # every day at 00:00 UTC
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v8
+        with:
+          days-before-stale: 30
+          days-before-close: 1
+          stale-issue-label: stale
+          exempt-issue-milestones: pending
+          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.
+          stale-pr-label: stale
+          exempt-pr-milestones: pending
+          stale-pr-message: >
+            This PR 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.