JpegXL image format

My usecase is the following:

I have a pretty big datastore; millions of image files. Given the scale, it was worth considering an investment into next-gen image formats. Between AVIF and JpegXL, it seems that JpegXL is [substantially more balanced](https://tonisagrista.com/blog/2023/jpegxl-vs-avif/) and has clearly more community interest. I therefore attempted to encode my data with JXL, saw good results and moved over.

Everything is on top of a BTRFS filesystem which can can reflink these files to labelstudio (which I prefer over symlinks as are safer). Labelstudio, however, does not support JXL, requiring me to transcode the relevant files back to JPEG (which I think it can be done losslessly) or PNG.

Not a whole lot of browsers support JXL (Safari + Firefox with flags). Depending on what takes Labelstudio to support a format, this might something worth considering now (if it is a matter of accepting a new mime) or postponing for later (if the ecosystem is deemed too immature).