Replace nft.storage with generic IPFS interface

[barnjamin]

nft.service has been slow lately and is limited to images. If we can replace with a generic IPFS service, this will allow market owners to have more flexability in storage options.

Additionally, a pinning service interface would be important to keep files from getting garbage collected.

[barnjamin]

In another project https://github.com/barnjamin/arc3.xyz im using web3.storage and it provides an interface for any asset types, not just images.