add stale issues action

.github/workflows/stale-issues.yml

@@ -0,0 +1,21 @@
+name: Close inactive issues
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch: # 允许手动触发
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - uses: actions/stale@v9
+        with:
+          exempt-issue-labels: "bug,documentation,enhancement"
+          days-before-issue-stale: 14
+          days-before-issue-close: 7
+          stale-issue-label: "stale"
+          stale-issue-message: "😾 长时间未活跃，将在 7 天后自动关闭。如未解决，请回复以保持活跃。"
+          close-issue-message: "😼 无反馈，已自动关闭。若仍需讨论，可重新打开。"
+          repo-token: ${{ secrets.GITHUB_TOKEN }} # 自动生成