fix(app): provide appDir via meta export

packages/app/meta.js

@@ -0,0 +1,5 @@
+const { resolve } = require('path')
+
+module.exports = {
+  appDir: resolve(__dirname, 'dist')
+}

packages/app/package.json

@@ -4,8 +4,10 @@
   "repository": "nuxt/framework",
   "license": "MIT",
   "main": "./dist/index.js",
+  "module": "./dist/index.js",
   "files": [
-    "dist"
+    "dist",
+    "meta.js"
   ],
   "scripts": {
     "build": "jiti ../../scripts/build .",

packages/app/src/index.js

@@ -0,0 +1 @@
+export * from './index.ts'

packages/nuxt3/src/nuxt.ts

@@ -1,4 +1,3 @@
-import { dirname } from 'path'
 import Hookable from 'hookable'
 import { loadNuxtConfig, LoadNuxtConfigOptions, Nuxt, NuxtOptions, installModule } from '@nuxt/kit'
 import { initNitro } from './nitro'
@@ -52,8 +51,8 @@ export async function loadNuxt (loadOpts: LoadNuxtOptions = {}): Promise<Nuxt> {
   })
 
   // Temp
-  // @ts-ignore
+  const { appDir } = await import('@nuxt/app/meta')
-  options.appDir = dirname(require.resolve('@nuxt/app'))
+  options.appDir = appDir
   options._majorVersion = 3
 
   const nuxt = createNuxt(options)