Adding isOwnerOf interface

[estarriolvetch]

Hi @DonkeVerse @jeffreyscholz

I am building two ERC1155 NFT implementations that also restricts themselves for 1/1 NFTs applications, and I am wondering whether we can have a common interface that can potentially be a standard in the future.

• https://github.com/ctor-lab/ERC1155Delta
• https://github.com/ctor-lab/ERC1155Soul

Since the implementation of ERC1155Delta doesn't allow querying the ownership information from the id in order to achieve constant-gas batch minting. Therefore, ownerOfERC721Like will not work in this implementation.

Instead, I am proposing to use the following interface for the ownership verification purpose.

 function isOwnerOf(address account, uint256 id) external view returns(bool);

Also, adding this interface to supportsInterface so the third-party contract can recognise it and enables applications that is only available to 1/1 NFTs.