Create close-stale-prs.yml (#33)

.github/workflows/close-stale-prs.yml

@@ -0,0 +1,15 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          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 15 days.'
+          close-pr-message: 'This PR was closed becuase it has been stalled for 60 days with no activity.'
+          days-before-pr-stale: 45
+          days-before-pr-close: 15