chore(node): add lint/test/check scripts and node tools CI

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/node-tools-ci.yml

@@ -0,0 +1,33 @@
+name: Node Tools CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: wled-node-tools-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  node-tools:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Quality gate
+        run: npm run check

package.json

@@ -9,6 +9,9 @@
   },
   "scripts": {
     "build": "node tools/cdata.js",
+    "lint": "node --check tools/cdata.js",
+    "test": "npm run build",
+    "check": "npm run lint && npm run test",
     "dev": "nodemon -e js,html,htm,css,png,jpg,gif,ico,js -w tools/ -w wled00/data/ -x node tools/cdata.js"
   },
   "repository": {