add ci pipeline

.github/workflows/fmt-check.yml

@@ -0,0 +1,22 @@
+name: Format Check
+
+on: [push, pull_request]
+
+jobs:
+  fmt-check:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: '23'
+
+    - name: Install dev dependencies
+      run: npm install --only=dev
+
+    - name: Run format check
+      run: npm run fmt-check