feat(#9): Nuxt 4 migration

legalconsenthub/app/error.vue

@@ -0,0 +1,24 @@
+<template>
+  <UApp>
+    <UError :error="error" />
+  </UApp>
+</template>
+
+<script setup lang="ts">
+import type { NuxtError } from '#app'
+
+defineProps<{
+  error: NuxtError
+}>()
+
+useSeoMeta({
+  title: 'Page not found',
+  description: 'We are sorry but this page could not be found.'
+})
+
+useHead({
+  htmlAttrs: {
+    lang: 'en'
+  }
+})
+</script>