preparing serialization of entities

Game/Entity/EntityManager.h

@@ -27,6 +27,6 @@ struct EntityManager
 void             InitEntityManager(NonNullPtr<World> world);
 void             ShutdownEntityManager();
 EntityManager&   GetEntityManager();
-void             Serialize(NonNullPtr<EntityManager> entityManager);
 entity_template* RegisterEntity(EntityManager& manager, Entity* base, DerivedType entity);
+void             RegisterBaseEntity(EntityManager& manager, Entity&& base);
 void             UpdateEntityManager(EntityManager& manager);