Document Tasty Reader compatible features

[adpi2]

List all the compatible Scala 3 features

• give an example
• what are the limitations

List all the incompatible Scala 3 features

[bishabosha]

this seems to be accurate at https://docs.scala-lang.org/scala3/guides/migration/compatibility-classpath.html#supported-features

[bishabosha]

ok, actually the issue calls for description of the limitations when they exist