add Scala and SBT support

[Geal]

This project only supports Rust and cargo right now, and to get a great project, we need to support more platforms!

Here is how you can proceed:

declare a new module for your language
implement the Platform trait for your module, following the example code of the Rust module
For Scala, we should look for a build.sbt file in the probe() method, and call sbt build and sbt run in the build() and run() methods.