Add stale action Fixes #430

.github/workflows/stale.yml

@@ -0,0 +1,30 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v4
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          # Issues
+          stale-issue-message: 'This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days.'
+          close-issue-message: 'This issue was closed because it has been stalled for 14 days with no activity.'
+          days-before-issue-stale: 60
+          days-before-issue-close: 14
+          stale-issue-label: 'lifecycle/stale'
+          exempt-issue-labels: 'reproduced bug,lifecycle/frozen'
+          # PR
+          stale-pr-message: 'This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.'
+          close-pr-message: 'This PR was closed because it has been stalled for 14 days with no activity.'
+          days-before-pr-stale: 45
+          days-before-pr-close: 14
+          stale-pr-label: 'lifecycle/stale'
+          # dependencies label is added by dependabot
+          exempt-pr-labels: 'dependencies,lifecycle/frozen'