Support for JPEG-XL

[wutscher]

Enhancement

Now that JPEG-XL is supported by default on chrome, firefox and safari, it would be nice to be able to use them in lychee. The caniuse, "usage stat" has jumped from 14% to 60% in the last few weeks and is likely to jump even further, once the chromium derivatives catch up.

[ildyria]

#4899 are you talking about this ? 😆

[wutscher]

saw it a few minutes after posting 😅. Checked the issues and open PRs but not the closed ones.