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

scenes/data/lobby_data.gd

@@ -0,0 +1,31 @@
+class_name LobbyData extends Node
+
+
+func _init() -> void:
+	Globals.lobby_data = self
+
+
+@rpc("authority", "reliable")
+func connect_to_game() -> void:
+	# NOTE: Leave the lobby
+	MessageBus.emit_local("lobby_close_connection", null)
+
+	# NOTE: Join target game server
+	MessageBus.emit_local(
+		"game_start_client",
+		[
+			Globals.game_data.game_address,
+			Globals.game_data.game_port
+		],
+		true
+	)
+
+@rpc("authority", "reliable")
+func go_back_to_match_screen() -> void:
+	if multiplayer.is_server(): return
+
+	push_warning("Client peer disconnected...")
+
+	Globals.game_state.set_game_scene(                                     
+		"res://scenes/screens/lobby_screen/lobby.tscn"
+	)