Add JPEG-XL Support

[TheAznCoderPro]

Hello! On my computer I have a lot of *.jxl (JPEG-XL) image files. These open fine in Finder, as they are built into the CoreImage framework. However, SpaceDrive doesn't seem to be able to read them, and just shows them as an "unknown" file. A reference decoder is available. Thanks for considering.

[brxken128]

I'm not too sure the reference decoder would be much help, as we'd likely have to build and bundle it for each of the platforms that we support, all for one specific format. If there was a Rust decoder available, we could likely read them just fine and even create thumbnails.

One thing we can do is add extension and magic byte detection for .jxl files so they correctly display as images, but they won't have thumbnails until we can decode them sadly.

[TheAznCoderPro]

If there was a Rust decoder available, we could likely read them just fine and even create thumbnails.

There is a community-made Rust decoder available whose developer has ties with the devs of the file format
https://github.com/tirr-c/jxl-oxide

[brxken128]

I'll create a Linear issue for this and give it a shot when I get a chance!