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

scripts/client_networking.gd

@@ -17,8 +17,31 @@ func start_client(address: String = "127.0.0.1", port: int = 8080) -> void:
 	multiplayer.server_disconnected.connect(client_disconnected_from_server)
 	multiplayer.connection_failed.connect(client_connection_failed_to_server)
 
+
+func _wait_for_connection() -> void:
+	while not peer:
+		await get_tree().process_frame
+
+	while peer.get_connection_status() != 2:
+		await get_tree().process_frame
+
+func _wait_close_connection():
+	close_connection()
+
+	while peer:
+		await get_tree().process_frame
+
+
 func client_connected_to_server() -> void:
-	push_warning("Connected to server!")
+	assert(false, "This method needs to be overridden...")
+
+func client_disconnected_from_server() -> void:
+	assert(false, "This method needs to be overridden...")
+
+
+func client_connection_failed_to_server() -> void:
+	assert(false, "This method needs to be overridden...")
+
 
 func close_connection() -> void:
 	if not peer: return
@@ -27,13 +50,6 @@ func close_connection() -> void:
 
 	unset_client()
 
-func client_disconnected_from_server() -> void:
-	push_warning("Disconnected from, server...")
-
-func client_connection_failed_to_server() -> void:
-	push_warning("Connection failed!")
-
-	unset_client()
 
 func unset_client() -> void:
 	if not peer: return