feat: Add Node.js worker implementation and integrate worker type selection in UI

ChildWorkerNode/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "child-worker-node",
+  "version": "1.0.0",
+  "description": "Node.js implementation of CommTester ChildWorker",
+  "main": "child-worker.js",
+  "scripts": {
+    "start": "node child-worker.js"
+  },
+  "keywords": [
+    "ipc",
+    "named-pipe",
+    "child-worker"
+  ],
+  "license": "MIT",
+  "engines": {
+    "node": ">=18.0.0"
+  }
+}