fix: explicitly import nuxt composables

Author: danielroe

src/runtime/ionic.ts

@@ -1,4 +1,5 @@
 import { IonicVue } from '@ionic/vue'
+import { defineNuxtPlugin } from '#imports'
 
 export default defineNuxtPlugin(nuxtApp => {
   nuxtApp.vueApp.use(IonicVue)

src/runtime/router.ts

@@ -4,6 +4,7 @@ import {
   createMemoryHistory,
 } from '@ionic/vue-router'
 
+import { defineNuxtPlugin } from '#imports'
 import routes from '#build/routes'
 
 export default defineNuxtPlugin(nuxtApp => {