New port for Kotlin (multiplatform)

I needed to create a pure `kotlin` port for a MKP library, which I've done, and figured I could contribute it back to the main project.

**This is a direct `kotlin` port of the `java` library.**

I've got it set up to go under the `./kotlin` sub directory _(attempting to follow the language convention)_, but it's independent of the rest of the project and could be called whatever makes sense.

This ticket is being set up in accordance with the contributing guidelines, and to allow discussion before someone has to review a PR.