added stale issue actions (#59)

* misc: added stale-issue-pr action

Signed-off-by: Ankur Srivastava <best.ankur@gmail.com>

.github/workflows/stale.yaml

@@ -0,0 +1,22 @@
+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 60 days with no activity. Remove stale label or comment or this will be closed in 5 days.'
+          stale-issue-label: 'no-issue-activity'
+          close-issue-message: 'This issue was closed because it has been stalled for 10 days with no activity.'
+          stale-pr-message: 'This PR 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-label: 'no-pr-activity'
+          close-pr-message: 'This PR was closed because it has been stalled for 10 days with no activity.'
+          days-before-issue-stale: 60
+          days-before-pr-stale: 60
+          days-before-issue-close: 10
+          days-before-pr-close: 10