Split Image visualizer into Image/DepthImage/SegmentationImage

[Wumpf]

What

• follow-up to Make draw order editable & solve 2D flickering issues, add draw order to arrow2d archetype #6644
• Fixes Make image transparency explicit & split image visualizers #6548
• Fixes Image connected to a pinhole camera is not being shown in the space view. #6660

Lots of copy & paste between the three visualizers left. Didn't want to remove it entirely to not make it too hard to have them diverge more in the future. But thanks to some clean-up passes it's not too bad (imho).

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
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  • Using examples from latest main build: rerun.io/viewer
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[github-actions]

Deployed docs

Commit	Link
0db2e98	https://landing-fstt216ct-rerun.vercel.app/docs

[jleibs]

I really like how this worked out!

I agree the duplication is generally clearer than the mega-visualizer.

One observation (not actionable yet): the 2D view of the depth image visualizer still feels slightly strange to me, since it basically falls back to acting like a normal image and depth-meter, fill ratio, etc. stop being applicable. I'm still wondering if ther'es an opportunity to have the 2D view end up using the normal Image visualizer in this case (once we support colormaps in all images)

[Wumpf]

the 2D view of the depth image visualizer still feels slightly strange to me

💯 felt the same about it!