Add alt text to images and compositions

[toolness]

Folks with visual impairments won't be able to experience Nina's art, but due to the way that we're composing the symbols together, it might not be that hard to create alt text for them.

For example, take our creature composition:

Alt text for this could be described as:

An eye with antlers, arms, legs, a tail, and a crown. The crown has hands for horns, and those hands have arms for horns. The eye's left arm has wings for arms, and the eye's right arm has muscle arms.

Or something like that. It could be fun to auto-generate these kinds of descriptions, which could be fun to read, and also give visually impaired folks a better idea of what's in the picture.

[ninapaley]

That seems like a nice feature, which would just take names from the filenames and point names and convert them into English sentences. It's ben a while since I've hung out with visually impaired people to get their feedback on such things.

Something like this might also be useful down the line when we generate Mystic Symbolic Tarot cards!