chore: add workflow to handle stale items

.github/workflows/stale.yml

@@ -0,0 +1,38 @@
+name: Manage stale items
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # Run daily at midnight UTC
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          close-issue-message: >
+            This issue has been automatically closed after waiting 4 weeks with no response from the author.
+            If you have more information to provide, please feel free to reopen this issue or open a new one.
+          close-pr-message: >
+            This pull request has been automatically closed after waiting 4 weeks with no response from the author.
+            If you have more information to provide, please feel free to reopen this pull request or open a new one.
+          days-before-close: 14
+          days-before-stale: 14
+          only-labels: "status: waiting for author"
+          operations-per-run: 100
+          remove-stale-when-updated: true
+          stale-issue-label: "status: stale"
+          stale-issue-message: >
+            This issue has been waiting for a response from the author for 2 weeks with no activity.
+            If there is no further activity in the next 2 weeks, this issue will be automatically closed.
+            Maintainers: to keep this issue open indefinitely, remove the "status: waiting for author" label.
+          stale-pr-label: "status: stale"
+          stale-pr-message: >
+            This pull request has been waiting for a response from the author for 2 weeks with no activity.
+            If there is no further activity in the next 2 weeks, this pull request will be automatically closed.
+            Maintainers: to keep this pull request open indefinitely, remove the "status: waiting for author" label.