Transformation traits

[asinghvi17]

I've run into some interesting situations with the current transformation interface in GeoMakie/Makie, and some traits placed in type params might resolve this:

bboxtrait

• DirectBBox -> simply transform minima and maxima
• EdgeSampledBBox{N} -> sample and transform along edges
• FullSampledBBox{N} -> sample and transform an nxn grid inside the original box

This is doable now.

interpolationtrait

This is for a future Makie version where transformations can change the length as well as the values of data, if invoked with the plot type as a reference.

• Linear -> don't do anything, default.
• Geodesic -> resample in geodesic space, applicable only to lines.

All transformations should also reproject/circ-shift rasters if necessary to avoid artifacts.