ci: add stale issues pipeline

Author: deandreamatias

.github/workflows/stale.yaml

@@ -0,0 +1,17 @@
+name: "Close stale issues"
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v8
+        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 7 days."
+          close-issue-message: "This issue was closed because it has been stalled for 7 days with no activity."
+          days-before-stale: 30
+          days-before-pr-close: -1
+          any-of-issue-labels: 'awaiting author response'