feat: rollup build, basic typescript support and typescript app

packages/nuxt3/src/babel-preset-app/index.js

@@ -143,6 +143,8 @@ module.exports = (api, options = {}) => {
       shippedProposals,
       forceAllTransforms
     }
+  ], [
+    require('@babel/preset-typescript')
   ])
 
   // JSX

packages/nuxt3/src/index.ts

@@ -0,0 +1,3 @@
+export * from './core'
+
+export const getBuilder = () => import('./builder')

packages/nuxt3/src/webpack/config/base.ts

@@ -217,7 +217,7 @@ export default class WebpackBaseConfig {
 
     return {
       resolve: {
-        extensions: ['.wasm', '.mjs', '.js', '.json', '.vue', '.jsx'],
+        extensions: ['.wasm', '.mjs', '.js', '.ts', '.json', '.vue', '.jsx', '.tsx'],
         alias: this.alias(),
         modules: webpackModulesDir
       },

packages/nuxt3/src/webpack/config/client.ts

@@ -206,7 +206,7 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
 
     // Entry points
     config.entry = Object.assign({}, config.entry, {
-      app: [path.resolve(buildDir, 'entry.client.js')]
+      app: [path.resolve(buildDir, 'entry.client.ts')]
     })
 
     // Add HMR support

packages/nuxt3/src/webpack/config/server.ts

@@ -114,7 +114,7 @@ export default class WebpackServerConfig extends WebpackBaseConfig {
       target: 'node',
       node: false,
       entry: Object.assign({}, config.entry, {
-        app: [path.resolve(this.buildContext.options.buildDir, 'entry.server.js')]
+        app: [path.resolve(this.buildContext.options.buildDir, 'entry.server.ts')]
       }),
       output: Object.assign({}, config.output, {
         filename: 'server.js',