feat: Add no-response bot (#586)

Author: littleGnAl

.github/workflows/no-response.yaml

@@ -0,0 +1,39 @@
+# Borrow from https://github.com/flutter/flutter/blob/master/.github/workflows/no-response.yaml
+name: No Response
+
+# Both `issue_comment` and `scheduled` event types are required for this Action
+# to work properly.
+on:
+  issue_comment:
+    types: [created]
+  schedule:
+    # Schedule for five minutes after the hour, every hour
+    - cron: '5 * * * *'
+
+# By specifying the access of one of the scopes, all of those that are not
+# specified are set to 'none'.
+permissions:
+  issues: write
+
+jobs:
+  noResponse:
+    runs-on: ubuntu-latest
+    if: ${{ github.repository == 'AgoraIO/Agora-Flutter-SDK' }}
+    steps:
+      - uses: godofredoc/no-response@0ce2dc0e63e1c7d2b87752ceed091f6d32c9df09
+        with:
+          token: ${{ github.token }}
+          # Comment to post when closing an Issue for lack of response. Set to `false` to disable
+          closeComment: >
+            Without additional information, we are unfortunately not sure how to
+            resolve this issue. We are therefore reluctantly going to close this
+            bug for now.
+            If you find this problem please file a new issue with the same description,
+            what happens, logs and the output. All system setups
+            can be slightly different so it's always better to open new issues and reference
+            the related ones.
+            Thanks for your contribution.
+          # Number of days of inactivity before an issue is closed for lack of response.
+          daysUntilClose: 21
+          # Label requiring a response.
+          responseRequiredLabel: "waiting for customer response"