feat(nuxt): polyfill idle callback utils (#21863)

packages/nuxt/src/app/index.ts

@@ -4,6 +4,7 @@ export * from './nuxt'
 export * from './composables/index'
 export * from './components/index'
 export * from './config'
+export * from './compat/idle-callback'
 
 // eslint-disable-next-line import/no-restricted-paths
 export type { PageMeta } from '../pages/runtime/index'

packages/nuxt/src/imports/presets.ts

@@ -60,7 +60,9 @@ const appPreset = defineUnimportPreset({
     'preloadPayload',
     'isPrerendered',
     'definePayloadReducer',
-    'definePayloadReviver'
+    'definePayloadReviver',
+    'requestIdleCallback',
+    'cancelIdleCallback'
   ]
 })