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

layouts/GgzDefault.vue

@@ -0,0 +1,9 @@
+<template>
+  <v-app>
+    <div class="app">
+      <v-main>
+        <nuxt />
+      </v-main>
+    </div>
+  </v-app>
+</template>