ci: close inactive issues

.github/workflows/stale.yml

@@ -0,0 +1,27 @@
+name: "Close inactive issues"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+permissions:
+  issues: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+      - uses: actions/stale@v5
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          days-before-issue-stale: 30
+          days-before-issue-close: 7
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue has been open 30 days with no activity. This will be closed in 7 days."
+          close-issue-message: "This issue has been automatically marked as stale because it hasn't had any recent activity."
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          exempt-issue-labels: bug,enhancement