chore: upgrade to Vue3/Vuetify3

plugins/vuetify.ts

@@ -0,0 +1,14 @@
+import { createVuetify } from 'vuetify'
+import { defineNuxtPlugin } from '#app'
+
+import '@mdi/font/css/materialdesignicons.css'
+import 'vuetify/styles'
+
+export default defineNuxtPlugin((app) => {
+  const vuetify = createVuetify({
+    theme: {
+      defaultTheme: 'light',
+    },
+  })
+  app.vueApp.use(vuetify)
+})