title: Recreate Flutter's ios and android folder with Swift and Kotlin
body: <p>Hi I just found out that it is possible to create Flutter project with Swift and Kotlin. However, I'm already invested in my current projects and want to recreate the <code>ios</code> and <code>android</code> as Swift and Kotlin (currently they are default to Java and ObjC).</p>
  
  <p>Thanks.</p>