deck shuffling and rooms reset

Websockets/RoomManager.cs

@@ -31,6 +31,11 @@ public class RoomManager : IRoomManager
     {
         return Rooms.ContainsKey(roomId);
     }
+    
+    public void RemoveAllRooms()
+    {
+        Rooms.Clear();
+    }
 }
 
 public interface IRoomManager
@@ -40,4 +45,5 @@ public interface IRoomManager
     public List<string> GetAllRooms();
     public void RemoveRoom(string roomId);
     public bool RoomExists(string roomId);
+    public void RemoveAllRooms();
 }