Merge pull request #38 from kintone/chore-setup-actions-stale

chore: add actions/stale

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+name: "Close inactive issues and PRs"
+on:
+  schedule:
+    - cron: "45 3 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+      contents: write
+    steps:
+      - uses: actions/stale@v6
+        with:
+          days-before-stale: 30
+          days-before-close: 14
+          stale-issue-label: "stale"
+          stale-pr-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for 30 days with no activity. Remove stale label or comment or this will be closed in 14 days."
+          close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
+          stale-pr-message: "This PR is stale because it has been open for 30 days with no activity. Remove stale label or comment or this will be closed in 14 days."
+          close-pr-message: "This PR was closed because it has been inactive for 14 days since being marked as stale."
+          delete-branch: true