Add stale bot workflow (#182)

Author: sshyam-gupta

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+name: Close inactive issues and PRs
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/[email protected]
+        with:
+          days-before-stale: 30
+          days-before-close: 5
+          days-before-pr-close: -1
+          stale-issue-label: "stale"
+          exempt-issue-labels: "awaiting-approval,work-in-progress,dependencies"
+          exempt-pr-labels: "awaiting-approval,work-in-progress,dependencies"
+          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."
+          close-issue-message: "This issue was closed because it has been stalled for 5 days with no activity."
+          stale-pr-message: "This PR is stale because it has been open 30 days with no activity."
+          repo-token: ${{ secrets.GITHUB_TOKEN }}