Add support for Kotlin/Native

### Objective

Let `dadb` to work without a JVM using [Kotlin/Native](https://kotlinlang.org/docs/native-overview.html).

FWIW, `dadb` already works with GraalVM.

### Plan

We can be inspired by libraries that did the same before us – e.g. [Okio](https://github.com/square/okio) in [version 2](https://square.github.io/okio/changelog/#version-200-rc1).
