Feature Description: Similar to Webp formatting, I'd want avif support. It will save some room as its compression is better than png, jpg, and webp apperantly.

• Additional context: I think the AVIF, similar to Webp, will need a seperate encoding tool installed in the environment.

Now that even Edge supports it, I think it is relevant to support this format. It has better compression than all the others.
https://caniuse.com/avif

if you are able to, you can create a PR to implement it, I don't think the dev will do it himself