Fix incorrect handling of MetatypeType (T.Type)

[sidepelican]

I noticed that metatypeType was not being processed correctly.
Since T.Type is a generic metatype, it cannot be directly referenced as a concrete type for a handler in this context. It should have been treated as Any.

• target code

func useMetatype<T>(type: T.Type) -> T.Type

• before

var useMetatypeHandler: ((T.Type) -> T.Type)?
...

• after

var useMetatypeHandler: ((Any) -> Any)?
...

[fummicc1]

LGTM!