ci: add lock-issues workflow

.github/workflows/lock-issues.yml

@@ -0,0 +1,23 @@
+name: lock-issues
+
+on:
+  schedule:
+    - cron: '0 4 * * *'
+  workflow_dispatch:
+
+permissions:
+  issues: write
+
+jobs:
+  lock_issues:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Lock issues
+        uses: dessant/lock-threads@v5
+        with:
+          process-only: 'issues'
+          issue-inactive-days: '1'
+          issue-comment: >
+            This issue has been automatically locked.
+
+            Please open a new issue if this issue persists with any additional detail.