Add stale pr/issue action

.github/workflows/stale.yml

@@ -0,0 +1,30 @@
+name: 'Stale issue handler'
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@main
+        id: stale
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 7 days with no activity. Remove stale label or comment, or this will be closed in 10 days.'
+          stale-pr-message: 'This pull request is stale as it has been open for 7 days with no activity. Remove stale label or comment, or this will be closed in 10 days.'
+          close-pr-message: 'Pull request closed due to being stale.'
+          close-issue-message: 'Issue closed due to being stale. Please reopen if issue persists in latest version.'
+          days-before-stale: 7
+          days-before-close: 10
+          stale-issue-label: 'stale'
+          close-pr-label: 'outdated'
+          close-issue-label: 'outdated'
+          stale-pr-label: 'stale'
+          exempt-pr-labes: 'keep,blocked,before next release,after next release'
+          exempt-issue-labels: 'enhancement,keep,blocked'
+          exempt-all-pr-milestones: true
+          exempt-all-issue-milestones: true
+      - name: Print outputs
+        run: echo ${{ join(steps.stale.outputs.*, ',') }}
+