Added spectator mode in the war

I hope to add the function of watching the war in the game. When the enemy attacks you in the war, you and your teammates can watch how the enemy controls and defeats your team. For example, a 4300 player defeated our 4600 team. This makes us very unhappy, a player of such a low level can actually wipe out our six team 4600 in one go! The system can only show that our team is defeated, but we want to know how he defeated us. This is why I want to increase the spectator mode.