Add code formatting check to CI

Author: lberrymage

.github/workflows/ci.yaml

@@ -20,6 +20,16 @@ jobs:
           check-latest: true
       - run: npm ci
       - run: npm run build
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          check-latest: true
+      - run: npm ci
+      - run: npm run fmt:check
   lint:
     runs-on: ubuntu-latest
     steps: