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

components/Members/FieldHasChanges.vue

@@ -0,0 +1,5 @@
+<template>
+  <v-avatar color="info" class="mx-2" size="26">
+    <v-icon dark> mdi-check </v-icon>
+  </v-avatar>
+</template>