Add support in image viewer for the JXL (JPEG XL) image format

[ProtagNeptune]

[14:59:33.175][Info] Loading image details from https://danbooru.donmai.us/posts/7972397
[14:59:33.194][Warning] [Qt][default] QPixmap::scaled: Pixmap is a null pixmap
[14:59:33.661][Info] Image loaded from the file C:/Users/jelly/Grabber/@Favorites/img/b615f8f88b241ab9a5d57340333e32a6.jxl

[Bionus]

Qt doesn't seem to support JXL files indeed. There seem to be a plugin that exists though: https://github.com/novomesk/qt-jpegxl-image-plugin/releases
Do you happen to know if that plugin works? (they provide the DLL to put in the imageformats folder) If so I can try to see if it would be possible to bundle it in Grabber.