[Feature request] Multi-channel EXR support

[Speierers]

Hi @mcrescas, thank you so much for this great VSCode extension!

This is a feature request to add support for multi-channel EXR images. Similar to what's done in TEV, the channel names could be displayed at the botton and the Left/Right arrows could be used to navigate between the different channels. Also channels could be grouped based on common prefixes, or XYZ / RGB naming conventions.

Keep up the great work!

[mcrescas]

Hi @Speierers 👋 ,

Sadly I am currently quite limited in terms of loading EXR due to the loader (it is a custom one different from OpenEXR). At some point the plan is to migrate to a web-assembly version that would allow to load all the possible EXR in the world.
Indeed, having multichannel EXR would be really useful.