This provides access to the find user identities rpc on the clients
Depends on D11952
In progress. Will not land until I've tested on native that the rpc can successfully be called and returns Identity object
Appended an Object suffix to these names to match the protobuf code they are being set to :
export type IdentityObject = { username: string, ethIdentity: ?EthereumIdentityObject, farcasterId: ?string, }
Unsure if we should drop the suffix and call these EthereumIdentity and Identity as they will have the same exact fields as their protobuf counterparts