refactor: reorganize networking and data bridge scenes

* Move networking scenes under `controllers/networking`
* Move data bridge scene under `scenes/data`
* Rename the bridge node to `data_bridge`
* Update lobby UI scene path
* Remove unused lobby RPC node/script

controllers/networking/game_client.gd

@@ -0,0 +1,42 @@
+class_name GameClient extends ClientNetworking
+
+
+func _ready() -> void:
+	setup_signals()
+
+
+func setup_signals() -> void:
+	MessageBus.subscribe("game_start_client", _start_client)
+
+	MessageBus.subscribe("game_wait_for_connection", _wait_for_connection)
+	MessageBus.subscribe("game_close_connection", _wait_close_connection)
+	MessageBus.subscribe("game_peer_disconnected", _on_game_peer_disconnected)
+
+func _start_client(address: String = "127.0.0.1", port: int = 8080) -> void:
+	if peer: return
+	start_client(address, port)
+
+func _on_game_peer_disconnected() -> void:
+	close_connection()
+
+	Globals.multiplayer_data.reset()
+	Globals.lobby_data.go_back_to_match_screen()
+	MessageBus.clear_voided_listeners()
+
+func client_connected_to_server() -> void:
+	push_warning("Connected to server!")
+
+func close_connection() -> void:
+	if not peer: return
+
+	push_warning("Disconnected from, server...")
+
+	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()