chore: implement AST parsing of next config

test/create-payload-app/int.spec.ts

@@ -1,6 +1,7 @@
 import type { CompilerOptions } from 'typescript'
 
 import * as CommentJson from 'comment-json'
+import { initNext } from 'create-payload-app/commands'
 import execa from 'execa'
 import fs from 'fs'
 import path from 'path'
@@ -9,8 +10,6 @@ import tempy from 'tempy'
 import { fileURLToPath } from 'url'
 import { promisify } from 'util'
 
-import { initNext } from '../../packages/create-payload-app/src/lib/init-next.js'
-
 const filename = fileURLToPath(import.meta.url)
 const dirname = path.dirname(filename)