Add onboarding check workflow (#1764)

* add workflow

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.github/workflows/check-exampleKcl.yml

@@ -0,0 +1,36 @@
+name: Check Onboarding KCL
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+    paths:
+      - 'src/lib/exampleKcl.ts'
+
+permissions:
+  contents: read
+  issues: write
+  pull-requests: write
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Comment on PR
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const message = '`src/lib/exampleKcl.ts` has been updated in this PR, please review and update the `src/routes/onboarding`, if needed.';
+            const issue_number = context.payload.pull_request.number;
+            const owner = context.repo.owner;
+            const repo = context.repo.repo;
+
+            // Post a comment on the PR
+            await github.rest.issues.createComment({
+              owner,
+              repo,
+              issue_number,
+              body: message,
+            });