ci: bring back stale

.github/workflows/stale.yml

@@ -0,0 +1,41 @@
+name: Stale
+on:
+  schedule:
+    - cron: '0 * * * *'
+  workflow_dispatch:
+
+permissions:
+  issues: write # to close stale issues (actions/stale)
+  pull-requests: write # to close stale PRs (actions/stale)
+
+jobs:
+  stale:
+    name: Stale
+    runs-on: ubuntu-latest
+    steps:
+      - name: 🧹 Clean stale issues and pull requests
+        uses: actions/stale@v8
+        with:
+          stale-issue-message: >
+            There hasn't been any activity on this issue recently.
+            This issue has now been marked as stale and will be closed if no further activity occurs.
+            Please, update to the latest version and check if that solves the issue.
+
+            Thank you for your contributions!
+          close-issue-message: >
+            This issue was closed because it has been stalled for 30 days with no activity.
+            Please open a new issue if the issue is still relevant, linking to this one.
+          stale-pr-message: >
+            This PR is stale because there hasn't been any activity for a long time.
+          close-pr-message: >
+            This PR was closed because it has been stalled for 30 days with no activity.
+          days-before-issue-stale: 60
+          days-before-pr-stale: 90
+          days-before-issue-close: 30
+          days-before-pr-close: 30
+          exempt-all-milestones: true
+          stale-issue-label: stale
+          stale-pr-label: stale
+          exempt-issue-labels: no-stale
+          exempt-pr-labels: no-stale
+          exempt-draft-pr: true