add room hangup proto

README.md

@@ -59,6 +59,8 @@
 | 125 | RoomLeaveRequest | c -> s | 客户端请求退出房间 |
 | 126 | RoomLeaveResponse | s -> c | 服务器响应退出房间 |
 | 127 | RoomLeavePush | s -> c | 服务器推送用户离开房间消息 |
+| 128 | RoomHangupRequest | c -> s | 客户端请求暂离房间 |
+| 129 | RoomHangupResponse | s -> c | 服务器响应暂离房间 |
 | 150 | RestoreRequest | c -> s | 客户端请求恢复数据 |
 | 151 | RestoreResponse | s -> c | 服务器响应当前状态 |
 | 152 | SyncRequest | c -> s | 客户端同步数据 |