Add resolved issue locking

.github/workflows/resolved-issue-locking.yml

@@ -0,0 +1,13 @@
+name: Lock resolved issues and PRs
+on:
+  schedule:
+    - cron: '0 0 * * *'
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v2
+        with:
+          github-token: ${{ github.token }}
+          issue-lock-inactive-days: '30'
+          pr-lock-inactive-days: '30'