ci: add workflow to lint with prettier

Author: danielpza

.github/workflows/main.yml

@@ -3,6 +3,17 @@ name: Node.js CI
 on: [push]
 
 jobs:
+  prettier:
+    runs-on: ubuntu-latest
+    steps:
+      - run: actions/checkout@v4
+      - run: corepack enable
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: yarn
+      - run: yarn prettier --check .
+
   build:
     runs-on: ${{ matrix.os }}
     strategy: