Add nudging wf

.github/workflows/nudge-reviewer.yml

@@ -0,0 +1,29 @@
+# A workflow to close issues where the author hasn't responded to a request for
+# more information; see https://github.com/actions/stale.
+
+name: No Response
+
+# Run as a daily cron.
+on:
+  schedule:
+    # Every day at 8am
+    - cron: '0 8 * * *'
+
+# All permissions not specified are set to 'none'.
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  no-response:
+    runs-on: ubuntu-latest
+    if: ${{ github.repository_owner == 'dart-lang' }}
+    steps:
+      - uses: actions/stale@28ca1036281a5e5922ead5184a1bbf96e5fc984e
+        with:
+          days-before-pr-stale: 7
+          days-before-issue-stale: -1
+          days-before-close: -1
+          stale-issue-label: "needs-info"
+          stale-pr-message: "Hi @${{ github.event.pull_request.pull_request.requested_reviewers }}."
+          stale-pr-label: "needs-info"