feat: update TypeScript config for platform services

- Add useDefineForClassFields for class field initialization
- Remove test-playwright from includes
- Add tsconfig.node.json reference
- Remove redundant node_modules exclude

tsconfig.node.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.*"]
+}