Add workflow to lock old threads

.github/workflows/lock.yml

@@ -0,0 +1,43 @@
+name: Lock closed issues/pull-requests
+
+on:
+  # 00:00 hours UTC, i.e. 16:00 hours PST or 17:00 hours PDT
+  schedule:
+    - cron: '0 0 * * 0'
+
+  # allow manual trigger
+  workflow_dispatch:
+
+concurrency:
+  group: lock
+
+permissions:
+  issues: write
+  pull-requests: write
+  discussions: write
+
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v5
+        with:
+          process-only: 'issues, prs, discussions'
+          issue-inactive-days: 30
+          pr-inactive-days: 30
+          discussion-inactive-days: 730
+          issue-comment: >
+            This issue has been automatically locked since there
+            has not been any recent activity after it was closed.
+            Please open a new issue for related bugs and link to
+            relevant comments in the thread.
+          pr-comment: >
+            This pull request has been automatically locked since there
+            has not been any recent activity after it was closed.
+            Please open a new issue for related bugs and link to
+            relevant comments in the thread.
+          discussion-comment: >
+            This discussion has been automatically locked since there
+            has not been any recent activity after it was closed.
+            Please open a new discussion for related items and link to
+            relevant comments in the thread.