On-chain Cryptopunks data URI encoding

[bpierre]

On the new contract generating the Cryptopunks images, the SVG returned as a data URI is not URI encoded, which means it can’t be used directly (e.g. on <img src="">) without processing it.

This is how useNft() does it for example:

https://github.com/spectrexyz/use-nft/blob/e136d484c2a84bf99947d1cc1e15fb33f99bf140/src/fetchers/shared/cryptopunks.ts#L22-L28

It would be ideal if punkImageSvg() would return a string that is already URI encoded.