Switch to actions/stale (#93)

* Delete .github/stale.yml

* Create stale.yml

Author: shenxianpeng

.github/stale.yml

@@ -0,0 +1,10 @@
+name: 'Close stale issues'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+permissions:
+  issues: write
+
+jobs:
+  stale:
+    uses: cpp-linter/.github/.github/workflows/stale.yml@main