chore(workflows): add stale workflow

.github/workflows/stale.yml

@@ -0,0 +1,22 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+
+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.'
+          stale-pr-message: 'This pull request is stale because it has been open 30 days with no activity.'
+          stale-issue-label: 'stale-issue'
+          exempt-issue-labels: 'enhancement,documentation,good-first-issue,question'
+          stale-pr-label: 'stale-pr'
+          exempt-pr-labels: 'work-in-progress'
+          days-before-stale: 30
+          days-before-close: -1