Add option to enable easy java module path loading

[bjornregnell]

Is your feature request related to a problem? Please describe.
From Java 16 it is deprecated to load java modules from the class path. If you do you will get a warning that I guess eventually will be an error.

Describe the solution you'd like
An option to make relative paths to modules loadable in accordance with the new java module system. We need a nicer UX than the alternative described below.

Describe alternatives you've considered
A workaround may be to use something similar to

//> using javacOpt --module-source-path /Users/pchabelski/IdeaProjects/scala-cli-tests-2/untitled/hello-java-fx/.scala-build/hello-java-fx_c5fe86d8db/classes/main
//> using javaOpt --module-path /Users/pchabelski/IdeaProjects/scala-cli-tests-2/untitled/hello-java-fx/javafx-sdk-22.0.2/lib --add-modules javafx.controls

The example above is from a Discord discussion here: https://discord.com/channels/632150470000902164/901153021638082660/1286265411385425981

This is ugly as the path is hard-coded into the build and will not work if the repo is cloned elsewhere etc.

Additional context
This is relevant for e.g. JavaFX and I have a minimal JavaFX app here that needs this:
https://github.com/bjornregnell/minimal-scala-with-javafx
and at the time of writing it produces this warning:

"Unsupported JavaFX configuration: classes were loaded from unnamed module ..."

More details on the warning here:
https://stackoverflow.com/questions/67854139
scala/scala-dev#529
https://users.scala-lang.org/t/scala-jdk-11-and-jpms/6102/33