Use shared workflow for locking

.github/workflows/lock.yml

@@ -1,28 +1,11 @@
 ---
-name: Lock
+name: Lock closed issues and PRs
 
 on:
   schedule:
-    - cron: "30 0 * * *"
+    - cron: "30 0 * * *" # Run daily at 00:30 UTC
   workflow_dispatch:
 
-permissions:
-  issues: write
-  pull-requests: write
-
-concurrency:
-  group: lock
-
 jobs:
   lock:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: dessant/lock-threads@v5.0.1
-        with:
-          pr-inactive-days: "1"
-          pr-lock-reason: ""
-          exclude-any-pr-labels: keep-open
-
-          issue-inactive-days: "7"
-          issue-lock-reason: ""
-          exclude-any-issue-labels: keep-open
+    uses: esphome/workflows/.github/workflows/lock.yml@main