fix(nuxt): mark internal island components with `@__PURE__` (#25842)

packages/nuxt/src/app/components/nuxt-teleport-island-component.ts

@@ -13,6 +13,7 @@ type ExtendedComponent = Component & {
  * component only used with componentsIsland
  * this teleport the component in SSR only if it needs to be hydrated on client
  */
+/* @__PURE__ */
 export default defineComponent({
   name: 'NuxtTeleportIslandComponent',
   props: {

packages/nuxt/src/app/components/nuxt-teleport-island-slot.ts

@@ -4,6 +4,7 @@ import { useNuxtApp } from '../nuxt'
 /**
  * component only used within islands for slot teleport
  */
+/* @__PURE__ */
 export default defineComponent({
   name: 'NuxtTeleportIslandSlot',
   props: {