CompressedDepth decoding for re_mcap

[makeecat]

Is your feature request related to a problem? Please describe.
CompressedDepth encoded with RVL does not work with mcap visualization with re_mcap

Describe the solution you'd like
Implement CompressedDepth decoding functionality in the compressed_image.rs

Describe alternatives you've considered
None

Additional context
I already have a working prototype; I would like to use this issue to discuss the scope of a potential PR.

[Wumpf]

Related / overlapping with

• Add EncodedDepthImage archetype #9046

[grtlr]

Yeah I think first having an EncodedDepthImage archetype (that mimics EncodedImage) like @oxkitsune proposed makes sense, from that the remaining changes would come more naturally.

[makeecat]

I will start implementing the EncodedDepthImage archetype and prepare a PR. I will move the conversation to #9046. Once we merge the EncodedDepthImage archetype we can come back to this issue and prepare a second PR

[grtlr]

That would be awesome 🚀!

[makeecat]

We are implementing the re_mcap support of RVL in one PR #11877, feel free to add comment.