Login / Loginless player login

[StealthOrc]

Normal players of a board should be able to login via Discord OAUTH
OR
choose an icon and type in a self assigned name for a loginless login

The GameMaster is required to login via OAUTH (Discord for now, Google later on?).

For this process we need an interface in the yew app to make requests to the backend.
@MarioTheDragon is looking into implementing OAUTH for discord right now. Once this is done, backend capabilities should be available.
Normal players must be able to login anonymously via icon and name!