`scala_repl` is broken for Scala 3

[WojciechMazur]

REPL in Scala 3 uses different main class then the one used for Scala 2, the main class should be selected dynamically
for Scala 2: scala.tools.nsc.MainGenericRunner
for Scala 3: dotty.tools.repl.Main

Also in upcoming Scala 3.8 REPL was seperated from compiler artifact and introduces dependenices on fansi for syntax highliting / rendering