Add GHA to close stale issues and PRs (#1393)

* Add GHA to close stale issues and PRs

* Match the config value

* mend

Match the config value

* increase stale duration to 25 days so that the total is 30 days

.github/workflows/issues.yaml

@@ -0,0 +1,19 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v4
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 25 days with no activity. Remove stale label or comment or this will be closed in 5 days.'
+          close-issue-message: 'This issue was closed because it has been stalled for 5 days with no activity.'
+          days-before-issue-stale: 25
+          days-before-issue-close: 5
+          stale-pr-message: 'This PR is stale because it has been open 25 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 5 days with no activity.'
+          days-before-pr-stale: 25
+          days-before-pr-close: 5