add prettier check (github workflow)

.github/workflows/prettier.yml

@@ -0,0 +1,22 @@
+name: Prettier
+
+on: [push, pull_request]
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 'lts/*'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Check code formatting with Prettier
+        run: npm run format:check

ui/base/element.js

@@ -6,7 +6,8 @@ let localStyles = {};
 export class OBElement extends HTMLElement {
     root;
 
-    constructor() {
+    constructor() 
+    {
         super();
 
         this.initialized = new Promise((resolve) => {