Use new Kotlin multiplatform Uuid

[Whathecode]

CARP created it's own UUID implementation, since no multiplatform solution was around when CARP was created.

However, it seems that as part of the Kotlin 2.0 release, there is now a multiplatform (still experimental) Uuid class: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.uuid/-uuid/

Investigate whether this could be used instead.