Develop NFT Contract Structure

[whoabuddy]

Since this is not a normal/standard marketplace contract, I expect we'll have a few design elements to think through, including:

• how does a mint-runner register with the protocol to be able to perform NFT mints?
• how are the NFT mint contracts known to the protocol, starting with this first one?
  • suspecting Clarity traits would be very useful here
• should this be under a simple xDAO structure?
  • our group could be early approvers for proposals
  • extensions could define things like the NFT mint registry
  • allows for simple testing but powerful expansion
  • should the NFT be owned by the DAO?
  • are there any considerations for artist commissions?

The DAO could be a good place to keep the NFT escrow contract as well.

[whoabuddy]

Linking bitcoin-nfts/mint-runner#16

[whoabuddy]

Update: all NFT contact functions are added, including signatures for verifying the Bitcoin TX - this part still needs to be filled in and this PR reviewed.

[whoabuddy]

Closing this out as there are now several smaller issues outlining remaining tasks.