kotlin: Kotlin scripts are aggressively cached

Kotlin ships with built in support for convenient scripting, but beware its caching that will not check imported files or dependencies until the entry point script changes:

https://github.com/Kotlin/kotlin-script-examples/blob/master/jvm/main-kts/MainKts.md#caching

If you need to work around this you can set the environment variable KOTLIN_MAIN_KTS_COMPILED_SCRIPTS_CACHE_DIR and kotlin will cache compiled scripts there, so you can delete it when you need to.