feat: Add format check

Author: spotandjake

.github/workflows/format.yml

@@ -0,0 +1,19 @@
+name: Format Check
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check Formatting
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20.x"
+      - run: |
+        npm ci
+        npm run format
+        git diff --exit-code --name-only