feat: add workflow to automatically close stale issues

Author: shijistar

.github/workflows/stale-issues.yml

@@ -0,0 +1,35 @@
+name: Close Stale Issues
+
+on:
+  schedule:
+    # Run once daily at midnight UTC
+    - cron: "0 0 * * *"
+  workflow_dispatch: # Allow manual triggering
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+      - uses: actions/stale@v9
+        with:
+          # Inactive days before marking as stale
+          days-before-stale: 60
+          # Days before closing after marking as stale (0 means close immediately)
+          days-before-close: 7
+          # Do not process PRs, only issues
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          # Label to add to inactive issues
+          stale-issue-label: "stale"
+          # Comment when marking as stale
+          stale-issue-message: "This issue has been inactive for 2 months and will be automatically closed in 7 days. If the issue still exists, please reply to this issue."
+          # Comment when closing
+          close-issue-message: "This issue has been automatically closed due to prolonged inactivity. You can reopen it if necessary."
+          # Labels of issues that will not be closed
+          exempt-issue-labels: "pinned,security,bug"
+          # Labels of issues that will not be closed
+          # exempt-assignees: 'username1,username2'