Migrate from probot/stale to GitHub Actions

.github/stale.yml

@@ -1,25 +0,0 @@
-# Configuration for probot-stale - https://github.com/probot/stale
-
-# Number of days of inactivity before an Issue or Pull Request becomes stale
-daysUntilStale: 30
-# Number of days of inactivity before a stale Issue or Pull Request is closed
-daysUntilClose: 7
-# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
-exemptLabels:
-  - Bug
-  - Feature Request
-  - Discussion
-  - Help Wanted
-# Label to use when marking as stale
-staleLabel: stale
-# Comment to post when marking as stale. Set to `false` to disable
-markComment: >
-  This issue has been automatically marked as stale because lack of
-  recent activity. It will be closed if no further activity occurs. Thank you
-  for your contributions. You can also use our [support channels](https://github.com/next-theme/hexo-theme-next#feedback) to get help with the project.
-# Comment to post when removing the stale label. Set to `false` to disable
-unmarkComment: false
-# Comment to post when closing a stale Issue or Pull Request. Set to `false` to disable
-closeComment: false
-# Limit to only `issues` or `pulls`
-only: issues

.github/workflows/stale.yml

@@ -0,0 +1,22 @@
+name: Close Stale Issues
+
+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 has been automatically marked as stale because lack of
+          recent activity. It will be closed if no further activity occurs. Thank you
+          for your contributions. You can also use our [support channels](https://github.com/next-theme/hexo-theme-next#feedback) to get help with the project.
+        exempt-issue-labels:
+          - Bug
+          - Feature Request
+          - Discussion
+          - Help Wanted