Add stale

.github/workflows/stale.yml

@@ -0,0 +1,31 @@
+name: Close stale issues and PRs
+on:
+  schedule:
+    - cron: "30 1 * * *"
+  workflow_dispatch:
+  issue_comment:
+    types: [created]
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - id: create_token
+        uses: tibdex/github-app-token@v2
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.PRIVATE_KEY }}
+    
+      - uses: actions/stale@v8
+        with:
+          stale-issue-message: "This issue is stale because it has been open 10 days with no activity. Remove stale label or comment or this will be closed in 7 days."
+          stale-pr-message: "This PR is stale because it has been open 7 days with no activity. Remove stale label or comment or this will be closed in 4 days."
+          close-issue-message: "This issue was closed because it has been stale for 17 days with no activity."
+          close-pr-message: "This PR was closed because it has been stale for 14 days with no activity."
+          days-before-issue-stale: 10
+          days-before-pr-stale: 7
+          days-before-issue-close: 17
+          days-before-pr-close: 14
+          exempt-pr-labels: not-stale
+          exempt-issue-labels: not-stale
+          repo-token: ${{ steps.create_token.outputs.token }}