Support any kind-projections with Cross-Quotes (work around Scala 2 limitation)

[MateuszKubuszok]

It seems to be impossible to use kinds projectors with Type.Ctors on Scala 2 using some native compiler logic - what if we offer a workaround?

// replace
Type.Ctor1.of[Either[String, *]]
// with
Type.Ctor2.of[Either]
  .fixLeft[String] // Type.Ctor1[Either[String, *]] which
                   // uses the logic for Type.Ctor2
                   // AND checks if the first param is <:< String on unapply
                   // AND sets it to String on apply

or/and we can try to implement such a logic in the macro - figure out the right type ctor, AND fix all known type params.

[MateuszKubuszok]

For now we have a workaround, but it would be nice if the proper solution also worked.