`cs launch` with scala-native apps launches them in a JVM

It would be great if `cs launch` replicated the behavior of `install` for Native apps - just get a prebuilt binary, and run it.

Start by comparing the `cs launch` and `install` command implementations, focusing on how each handles Scala Native apps. Trace the launch path for a Scala Native application and identify the existing prebuilt-binary behavior in `install`. Done means `cs launch` runs the prebuilt native binary rather than launching the app in a JVM.

Written by the indexing model from the issue text.