Reorganized and cleaned up the solution.

Include/Common/ForwardDecl.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <memory>
+
+class RealmUser;
+using sptr_user = std::shared_ptr< RealmUser >;
+using wptr_user = std::weak_ptr< RealmUser >;
+
+class GameSession;
+using sptr_game_session = std::shared_ptr< GameSession >;
+
+class RealmSocket;
+using sptr_socket = std::shared_ptr< RealmSocket >;
+
+class ByteBuffer;
+using sptr_byte_stream = std::shared_ptr< ByteBuffer >;
+
+class ChatRoomSession;
+using sptr_chat_room_session = std::shared_ptr< ChatRoomSession >;
+
+class RealmCharacter;
+using sptr_realm_character = std::shared_ptr< RealmCharacter >;