Generate code for accessing marked subclasses in a feature module

[AlecKazakova]

I'm imagining something where we have an interface like

interface Applet {
  fun doSomeStuff()
  
  companion object : DynamicFeatureInterface
}

and then we generate some code so you can do

Applet.implementations().forEach { applet ->
  applet.doSomeStuff()
}

behind the scenes it does reflection, but the gradle plugin is able to find all the implementations at compile time and generate the reflection code so its typesafe