refactor: simplify lobby server architecture and update app metadata

* remove legacy data bridge, RPC, and server bootstrap files
* simplify lobby scene and node hierarchy
* rename lobby UI scene path and update signal handlers
* replace the application icon and configure the boot splash
* add project description and version metadata

scenes/data/game_state.gd

@@ -0,0 +1,24 @@
+class_name GameState extends Node
+
+
+
+
+func _init() -> void:
+	Globals.game_state = self
+
+
+func set_game_scene(scene_str: String) -> void:
+	var scene  = load(scene_str).instantiate()
+	var target = get_tree().root.find_child("scene", true, false)
+
+	scene.name = "lobby_screen"
+
+	clear_game_scene(target)
+
+	target.add_child(scene)
+
+func clear_game_scene(container: Node) -> void:
+	for child in container.get_children():
+		child.queue_free()
+
+	await get_tree().process_frame