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/lang/locales/sv-SE.ts

@@ -0,0 +1,8 @@
+export default defineI18nLocale(async () => {
+  const { sv: $vuetify } = await import("vuetify/locale");
+  const { default: svSE } = await import("../messages/sv-SE.json");
+  return {
+    ...svSE,
+    $vuetify,
+  };
+});