Send individualized player game states

[Souren]

Currently the entire game state is broadcasted to all players.

For efficiency and fairness we probably want to send a filtered game state for each player.

For example, we send the resources of all the players, but we might want to keep this a secret from players. Or we might want to only send game objects in a certain radius of the player.
@copacetic this is esp relevant for bots.