No equivalent to `-decompile` and `-print-tasty` scalac sub-commands

[bishabosha]

Is your feature request related to a problem? Please describe. If Scala CLI should eventually replace all scala scripts - then it should implement the -decompile and -print-tasty modes from the scalac script - which run a different main method depending on the choice.

These commands basically decompile TASTy code into either readable code, or a textual representation of the TASTy bytes.

Describe the solution you'd like re-implement the flags, or add some new sub commands

Describe alternatives you've considered rely on power users to use another tool, (e.g. coursier) to directly launch the main method from the compiler classpath for either decompile/tasty-print

Additional context This feature is pretty useful to power users.