[infra] enable a no-response issue triage bot

Change-Id: I9915cfe3eaecceb50bc6e78be6f96afa733dd5af
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/269381
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>
Reviewed-by: Kevin Moore <kevmoo@google.com>

.github/workflows/no-response.yml

diff --git a/.github/workflows/no-response.yml b/.github/workflows/no-response.yml
new file mode 100644
index 0000000..532862a
--- /dev/null
+++ b/.github/workflows/no-response.yml
@@ -0,0 +1,33 @@
+# A workflow to close issues where the author hasn't responded to a request for
+# more information; see https://github.com/godofredoc/no-response for docs.
+
+name: No Response
+
+# Both `issue_comment` and `scheduled` event types are required.
+on:
+  issue_comment:
+    types: [created]
+  schedule:
+    # Schedule for five minutes after the hour, every hour
+    - cron: '5 * * * *'
+
+# All permissions not specified are set to 'none'.
+permissions:
+  issues: write
+
+jobs:
+  noResponse:
+    runs-on: ubuntu-latest
+    if: ${{ github.repository == 'dart-lang/sdk' }}
+    steps:
+      - uses: godofredoc/no-response@0ce2dc0e63e1c7d2b87752ceed091f6d32c9df09
+        with:
+          responseRequiredLabel: "needs-info"
+          responseRequiredColor: 4774bc
+          closeComment: >
+            Without additional information we're not able to resolve this
+            issue, so it will be closed at this time. You're still free to add
+            more info and respond to any questions above, though. We'll re-open
+            the case if you do. Thanks for your contribution!
+          daysUntilClose: 14
+          token: ${{ github.token }}