Feature Request: Add JPEG-XL (JXL) Support

[EFIShell0]

JPEG-XL, an alternative to the EXR file format and now considered the standard HDR-supported image format, should be added.

[R3S3t9999]

jpeg-2000 is already supported, but none of the ffmpeg files I tried worked in Dolby Professional Tools if that's what you wanted to do.

::enable jpeg-2000 12bit encoding for FEL source in 8-2-3(default = NO)
set enable_jpeg12bit=NO
::set jpeg-2000 12bit encoding compression factor in 8-2-3 (default = 10)
set jpeg12bit_compression=10
::set jpeg-2000 12bit encoding pixel format 444 or 422 in 8-2-3 (default = 422)
set jpeg12bit_format=422