[close #528] add workflows to check staleness and PR title (#529)

.github/workflows/labeler.yml

@@ -1,4 +1,4 @@
-name: "Pull Request Labeler"
+name: "PR Labeler"
 on:
 - pull_request_target
 

.github/workflows/pr-title-checker.yml

@@ -0,0 +1,14 @@
+name: 'PR Title Checker'
+on:
+  pull_request:
+    types: [edited, opened, synchronize, reopened]
+
+jobs:
+  title-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: naveenk1223/action-pr-title@master
+        with:
+          regex: '\[to|fix|close #[0-9]+\] .+'
+          prefix_case_sensitive: true
+          max_length: -1

.github/workflows/stale-checker.yml

@@ -0,0 +1,19 @@
+name: 'Stale Checker'
+on:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v4
+        with:
+          days-before-stale: 30
+          stale-issue-message: 'This issue is stale because it has been open 30 days with no activity.'
+          stale-issue-label: 'status/stale'
+          days-before-issue-close: -1
+          stale-pr-message: 'This PR is stale because it has been open 30 days with no activity. Remove the status/stale label or comment or this PR will be closed in 7 days.'
+          stale-pr-label: 'status/stale'
+          days-before-pr-close: 7
+          close-pr-message: 'This PR was closed because it has been stalled for 7 days with no activity.'