[Discussion 2024] Adding an "undo" message to the game controller

Sometimes if a mistake occurs in the game controller, the referee will “undo” an action, but it is not clear to the robots that the state has been undone.
This can result in confusion as the robots may end up in an undesired state.
This proposal is to add undo information to the game controller message so that the robots can be aware that an action has been undone and can take appropriate action.