move snake builder into __init__ of snakes file and use it into server class

server/Server.py

@@ -1,6 +1,6 @@
 from server.Files import read_file
 from server.GameBoard import GameBoard
-from server.SnakeBuilder import SnakeBuilder
+from snakes import SnakeBuilder
 from quart_common.web.logger import await_log
 from quart_common.web.logger import build_logger
 from typing import cast