Explore usage of ktargeter plugin

[dzikoysk]

It's kinda annoying that we need to use use-site targets for Kotlin entities to enforce compiler to properly attach those annotations in bytecode, so regular Java annotation-processor is able to discover them in compile-time phase. There's a kinda nice and promising compiler plugin that theoretically removes that requirements:

• https://github.com/ktargeter/ktargeter

It might be a good idea to experiment a little bit with it to see if it solves that issue. If so, we could recommend it to Kotlin users.

[dzikoysk]

• Support ktargeter targets configuration through annotations ktargeter/ktargeter#40