Support JPEG XL

[roland-5]

If I understand correctly, wayshot by default save files as png and we can save as jpg extension too. I don't know if this is possible or would be enchantment you wanted in your project, but saving screenshots as JPEG XL (jxl) files would be awesome.

Very nice project!

[Shinyzenith]

Yep this is possible and I'm willing to work on it once I gain enough knowledge about encoding with jxl.

[Shinyzenith]

image-rs/image#1765
image-rs/image#1765

Related issues. I do not want to do any custom encoding / decoding right now to keep the codebase simple and easy to understand. If it does get implemented in image-rs then I'd be more than happy to expose libwayshot API calls for JXL.