refactor: decouple game networking from lobby client

* Replace direct client/server networking references with GameClient/GameServer scenes
* Refactor message bus to support local emission and argument expansion
* Move lobby connection lifecycle handling to message bus events
* Remove multiplayer connection wait helpers and direct lobby client coupling
* Rename Server to ServerNetworking and update lobby client references
* Update scene resources and export configuration

game_server.gd

@@ -0,0 +1,11 @@
+class_name GameServer extends ServerNetworking
+
+
+func _ready() -> void:
+	setup_signals()
+
+
+func setup_signals() -> void:
+	#MessageBus.subscribe("game_wait_for_connection", _wait_for_connection)
+	#MessageBus.subscribe("game_close_connection", _wait_close_connection)
+	pass