NFT vault

At first I developed this as "Cosigner NFT", but I changed my mind and now this project is "NFT vault", for an module account that is connected with the NFT ownership. After we developed this project, we noticed that this project is like IBC compatible "ERC-6551"

Details are here:

https://github.com/UnUniFi/hackathon-nftvault/blob/main/x/nftvault/README.md