Packages names sometimes required

https://heaps.io/api/h2d/ObjectFollower.html#new

The constructor is generated as `new(obj:Object, ?parent:Object)` but its real type is
`new(obj:h3d.scene.Object, ?parent:h2d.Object)`

I think we should generate explicit package name in documentation when there is such a class in the current (or parent) package. That should also fix for instance someone having a `pack.Array` class being documented as `Array` and thus creating confusion.