Add support for JPEG-XL as input format

[tillkamppeter]

JPG-XL is a more modern successor of JPG, supporting high color depths (>8 bits per color), HDR, more flexibility with compression rates, ... to allow for high-quality image files in a standard format. A free software library supporting this format is available, libjxl.

Therefore we should add support for this format and try to carry on to the printer as much as possible of the image quality, especially the higher color depth, as the PWG and CUPS Raster support up to 16 bits per color.

[TitikshaBansal]

Hello,
I am Titiksha Bansal, a participant in WoC 4.0. I came across this issue and found the idea of adding JPG-XL support to be a valuable enhancement. I would love to work on this issue and would appreciate any guidance or suggestions. I am looking forward to contributing!

[bits-and-atoms]

Hello,
I am Subham Majumder, a participant in WoC 4.0. I am eager to work on this issue and greatly value your insights or recommendations.

[HinTak]

Skia has support for jpeg-xl, and there is plan to switch on jpeg-xl support at skia-python. Think there may be an existing issue

[HinTak]

See HinTak/skia-c-examples#4