ci: add prettier lint check workflow

.github/workflows/prettier-check.yml

@@ -0,0 +1,26 @@
+name: "Prettier Check"
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  lint_check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Setup NodeJS
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22.x"
+
+      - name: Install deps
+        run: npm i
+
+      - name: Check lint
+        run: npm run lint:ci