Web3login

Pinned old version of EIP712.

FastAPI middleware checks the authorization header on the request. If it represents a correct format of authorization Bearer or Web3 header, adds attributes to the request.state and pass request.

Unified authentication scheme, added application field.

Added `OAuth2BearerOrSignature` FastAPI middleware with support `Bearer` and `Moonstream` token in Authorization header. Fixed types.

Initial release provides authorization and registration schemas, CLI, FastAPI middleware.