add stalebot

Signed-off-by: schristoff <[email protected]>

.github/actions/stale/actions.yml

@@ -0,0 +1,18 @@
+name: 'Close stale issues and PR'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          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 10 days.'
+          stale-pr-message: 'This PR is stale because it has been open 45 days with no activity.'
+          close-issue-message: 'This issue was closed because it has been stalled for 10 days with no activity.'
+          exempt-all-milestones: true 
+          days-before-stale: 60
+          days-before-close: 10
+          days-before-pr-close: -1