#1525 add avif support

[the-database]

Adds support for loading and saving images in the AVIF format, using pillow-avif-plugin as suggested in #1525.

There are tons of potential options that could be added to the save node for AVIF (see options from libavif and options exposed by pillow-avif-plugin). I kept things to a minimum and only exposed quality and subsampling. Notably, the lossless option is missing since pillow-avif-plugin doesn't expose it. I've read that AVIF lossless isn't that great at reducing file sizes anyway, but I'm not sure how true that is.

Also, I made some guesses when working with with_id and if_enum_group, please let me know if those magic numbers need any corrections.

[joeyballentine]

Thanks for this addition! Could you please format your code changes with ruff?

[the-database]

Thanks for this addition! Could you please format your code changes with ruff?

Done. I had to add # noqa to the import statements as ruff wanted to remove them for appearing unused, but they're needed to add AVIF support to pillow's Image.save and Image.load.

[joeyballentine]

LGTM