refactor: set hydrated value in nuxt plugin

composables/hydration.ts

@@ -1,8 +1 @@
 export const isHydrated = ref(false)
-
-if (!process.server) {
-  const nuxtApp = useNuxtApp()
-  nuxtApp.hooks.hookOnce('app:suspense:resolve', () => {
-    isHydrated.value = true
-  })
-}

plugins/hydration.client.ts

@@ -0,0 +1,5 @@
+export default defineNuxtPlugin((nuxtApp) => {
+  nuxtApp.hooks.hookOnce('app:suspense:resolve', () => {
+    isHydrated.value = true
+  })
+})