Add workflow for stalle issues and PRs

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+name: "Close stale issues and PRs"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: "This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days."
+          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-issue-message: "This issue was closed because it has been stalled for 5 days with no activity."
+          close-pr-message: "This PR was closed because it has been stalled for 10 days with no activity."
+          days-before-issue-stale: 30
+          days-before-issue-close: 5
+          days-before-pr-stale: 45
+          days-before-pr-close: 10
+          stale-issue-label: "no-issue-activity"
+          exempt-issue-labels: "help wanted,enhancement"
+          stale-pr-label: "no-pr-activity"
+          exempt-pr-labels: "dependencies,awaiting-approval,work-in-progress"