Advanced Provider with heavy dependencies

[SimonDanisch]

I'm currently adding Elevation + Pointcloud providers and was about to put them in a new Package since they have quite some juicy dependencies.
Do we care about this, or do we rather have everything in one place here and have Tyler be more heavyweight in turn?
I dont see how we could use pkg extensions for this, so don't think this is an option.

[asinghvi17]

How heavyweight are we talking here? I think Tyler should work on every platform Makie works on, since it is pretty much pure Julia save for the image libraries (and openGL/cairo). If that line isn't crossed then it shouldn't be too much of an issue to add dependencies IMO

[lazarusA]

I think Tyler should eventually bring together as many features as possible. So, seeing it grow on dependencies should be expected.

[rafaqz]

Sounds fine to me.

Should we make ElevationProviders.jl and PointCloudProviders.jl to wrap the provider lists?