Merge branch '0_15' into GitHub-Actions

.github/workflows/wled-ci.yml

@@ -1,4 +1,4 @@
-name: PlatformIO CI
+name: WLED CI
 
 on: [push, pull_request]
 
@@ -78,3 +78,17 @@ jobs:
         files: |
           *.bin
           *.bin.gz
+
+
+  testCdata:
+    name: Test cdata.js
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+      - run: npm ci
+      - run: npm test