Ability to change the color of the Pinhole camera frustum (currently it's always gray)

[rjeye]

Is your feature request related to a problem? Please describe.
It'd be great if Pinhole had a color parameter that can be set - currently the camera frustum's lines are alway gray by default. Having the lines be a different color would help easily differentiate between different cameras - such as query vs reference vs prediction in visual localization etc.

Describe the solution you'd like
An additional color parameter for rr.Pinhole which would look like:

rr.log(
f"world/camera_{frame_id}/image",
rr.Pinhole(
resolution=[W, H],
focal_length=[K[0, 0], K[1, 1]],
principal_point=[K[0, 2], K[1, 2]],
### color=[255,127,80], # RGB for coral!
),
)

Describe alternatives you've considered
One possible albeit tedious method could always be to build this ourselves using LineStrips3D - but that's clearly a workaround.

Additional context
Taken from https://nianticlabs.github.io/mickey/. Coloring different cameras would help visually distinguish between different baselines, or color the camera estimate a certain color based on its pose error.