notify cerebrum upon a breaking change

.github/workflows/label-triggers.yml

@@ -0,0 +1,22 @@
+name: Label-based Triggers
+on:
+  pull_request_target:
+    types:
+      - labeled
+
+jobs:
+  comment_on_breaking_change:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check if 'breaking change' label is added
+        if: github.event.label.name == 'breaking-change'
+        uses: actions/github-script@v6
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: '@opentensor/cerebrum breaking change detected! Please review the changes
+              and prepare accordingly!'
+            })