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/error.vue

@@ -0,0 +1,30 @@
+<template>
+  <div class="container">
+    <h1>Error {{ error.statusCode || '' }}</h1>
+    <span>{{ error.message }}</span>
+    <NuxtLink to="/">Home page</NuxtLink>
+  </div>
+</template>
+
+<script>
+export default {
+  layout: `${process.env.CUSTOMER}Admin`,
+  props: {
+    error: {
+      type: Object,
+      default: null,
+    },
+  },
+  computed: {
+    errorMessage() {
+      if (this.error && this.error?.message) return this.error?.message
+      return 'An error occurred'
+    },
+  },
+  head() {
+    return {
+      title: this.errorMessage,
+    }
+  },
+}
+</script>