chore(create-payload-app): migrate to esm, adjust init-next tests

jest.config.js

@@ -1,10 +1,4 @@
-// const nextJest = require('next/jest.js')
-
-// const createJestConfig = nextJest({
-//   // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
-//   dir: './',
-// })
-
+/** @type {import('@jest/types').Config} */
 const customJestConfig = {
   extensionsToTreatAsEsm: ['.ts', '.tsx'],
   globalSetup: './test/jest.setup.ts',
@@ -23,5 +17,4 @@ const customJestConfig = {
   verbose: true,
 }
 
-// module.exports = createJestConfig(customJestConfig)
 export default customJestConfig