Support annotation processing

[raulraja]

Many of the docs in libs may include examples with annotations. That is actually the case in Kategory.
We should ensure that ank is able to process annotations as part of the script evaluation in the same fashion we are preprocessing with kapt
Ex:

Should compile:

@higherkind data class X<A>(val a: A) : XKind<A>
X(1)

Currently:

Exception in thread "main" javax.script.ScriptException: error: unresolved reference: XKind
@higherkind data class X<A>(val a: A) : XKind<A>