cleanup, folder restructure and ui restructure

scenes/game.gd

@@ -0,0 +1,12 @@
+extends Node3D
+
+@onready var ui: UI = $UI
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	# Update the UI when the Inventory (global) changes
+	Inventory.inventory_changed.connect(ui._update_ui)
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass