feat: add time to Gamestate

[JonathanStarup]

Fixes some of #65

[JonathanStarup]

@mlutze I'm not sure where to introduce a end/win-condition. I think a general GameState -> Bool or GameState -> Option[Winner] where Winner can be tie or somethings like that. I don't know where to introduce this. Is it a part of Gamestate even?

[mlutze]

I think it's external to GameState, since the winning condition will eventually depend on the game mode and other configuration. Maybe there's a GameMode namespace?

[JonathanStarup]

I think it's external to GameState, since the winning condition will eventually depend on the game mode and other configuration. Maybe there's a GameMode namespace?

But should the time still be a part of gamestate?

[mlutze]

I think it's external to GameState, since the winning condition will eventually depend on the game mode and other configuration. Maybe there's a GameMode namespace?

But should the time still be a part of gamestate?

Yes, I agree that time should still be part of it.