Mark issues and pull requests as stale

.github/workflows/stale.yaml

@@ -0,0 +1,37 @@
+name: Mark and close stale issues and pull requests
+
+# Please refer to https://github.com/actions/stale/blob/master/action.yml
+# to see all config knobs of the stale action.
+
+on:
+  schedule:
+  - cron: "0 0 * * *"
+
+permissions:
+  contents: read
+
+jobs:
+  stale:
+
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/stale@v4
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'A friendly reminder that this issue had no activity for 90 days. Stale issues will be closed after an additional 30 days of inactivity.'
+        stale-pr-message: 'A friendly reminder that this PR had no activity for 90 days. Stale PRs will be closed after an additional 30 days of inactivity.'
+        stale-issue-label: 'lifecycle/stale'
+        close-issue-label: 'lifecycle/rotten'
+        exempt-issue-labels: 'lifecycle/active,lifecycle/frozen'
+        stale-pr-label: 'lifecycle/stale'
+        close-pr-label: 'lifecycle/rotten'
+        exempt-pr-labels: 'lifecycle/active,lifecycle/frozen'
+        days-before-stale: 90
+        days-before-close: 30
+        close-issue-message: "This issue was closed because it has been inactive for 30 days since being marked as stale."
+        close-pr-message: "This PR was closed because it has been inactive for 30 days since being marked as stale."
+        remove-stale-when-updated: true