perf: require babel toolchains

Author: sxzz

src/fake-js.ts

@@ -1,5 +1,4 @@
-import _generate from '@babel/generator'
-import { parse } from '@babel/parser'
+import { createRequire } from 'node:module'
 import * as t from '@babel/types'
 import { isDeclarationType, isTypeOf, resolveString } from 'ast-kit'
 import { walk } from 'estree-walker'
@@ -14,8 +13,11 @@ import {
 import type { OptionsResolved } from './options.ts'
 import type { Plugin, RenderedChunk } from 'rolldown'
 
-const generate: typeof _generate.default =
-  (_generate.default as any) || _generate
+const require = createRequire(import.meta.url)
+const { parse } = require('@babel/parser') as typeof import('@babel/parser')
+const generate = (
+  require('@babel/generator') as typeof import('@babel/generator')
+).default
 
 // input:
 // export declare function x(xx: X): void