Integrate a remote playtesting front-end

board-network/src/protocol.rs

@@ -35,6 +35,7 @@ pub enum ServerMessage {
         room_name: String,
         players: Vec<(String, u32, bool)>,
         active_player: usize,
+        has_started: bool,
     },
     /// Notify that the room cannot be joined.
     JoinFailed(String),