Detect interfaces and common contract mixins

[shazow]

A convenient way to describe what a contract could be doing (especially if it's unverified) is by summarizing which interfaces it complies with.

We can do this either by using ERC-165 and looking for hardcoded interface IDs, or by comparing against known hashes of selectors in interfaces (https://github.com/shazow/eip-sighashes could be helpful for this).

Some common interfaces/functionality we want to look for:

• ERC20
• ERC721 (plus extensions like Enumerable, Receiver, Metadata)
• ERC1155
• Common OpenZeppelin and solmate contract patterns:
  • Ownable
  • ACL/Roles
• Proxies: https://github.com/gnosis/evm-proxy-detection