ci: add stale cron job (#1176)

.github/workflows/stale.yaml

@@ -0,0 +1,26 @@
+name: 'Close stale issues'
+on:
+  schedule:
+    - cron: '0 0 * * *'
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          close-issue-message: ${{ env.CLOSE_MESSAGE }}
+          close-pr-message: ${{ env.CLOSE_MESSAGE }}
+          days-before-stale: 30
+          days-before-close: 5
+          exempt-issue-labels: ${{ env.EXEMPT_LABEL }}
+          exempt-pr-labels: ${{ env.EXEMPT_LABEL }}
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-label: ${{ env.STALE_LABEL }}
+          stale-pr-label: ${{ env.STALE_LABEL }}
+          stale-issue-message: ${{ env.STALE_MESSAGE }}
+          stale-pr-message: ${{ env.STALE_MESSAGE }}
+        env:
+          CLOSE_MESSAGE: 'This issue has been closed because it is stale. Reopen if necessary.'
+          EXEMPT_LABEL: 'status: needs discussion'
+          STALE_LABEL: 'status: stale'
+          STALE_MESSAGE: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days'

package.json

@@ -73,6 +73,7 @@
   "xo": {
     "prettier": true,
     "rules": {
+      "no-warning-comments": "off",
       "sort-imports": "error",
       "sort-keys": "error",
       "sort-vars": "error"