Type piracy from MsgPack + GeometryBasics

[tkemmer]

We currently rely on type piracy to visualize spheres and cylinders through JSServe:

BiochemicalVisualization.jl/src/core/representation.jl

Lines 12 to 13 in 613116f

	MsgPack.msgpack_type(::Type{Cylinder3{T}}) where {T} = MsgPack.StructType()
	MsgPack.msgpack_type(::Type{Sphere{T}}) where {T} = MsgPack.StructType()