Initial Nuxt frontend import

- Complete GGZ Ecademy Nuxt.js user portal
- Learning products browser and management
- Member management interface
- User authentication and roles
- Multi-language support (NL/EN)
- Vuex store for state management
- Component-based architecture

lang/Ggz/.json

@@ -0,0 +1,5 @@
+{
+  "members": {
+    "tabs": {}
+  }
+}