feat: Migrate to Nuxt 3 framework (#5184)

Co-authored-by: Michael Genson <71845777+michael-genson@users.noreply.github.com>
Co-authored-by: Kuchenpirat <24235032+Kuchenpirat@users.noreply.github.com>

frontend/pages/admin.vue

@@ -0,0 +1,9 @@
+<script setup lang="ts">
+definePageMeta({
+  middleware: ["sidebase-auth", "admin-only"],
+});
+</script>
+
+<template>
+  <NuxtPage />
+</template>