Refactor game state and HUD:

- Removed the State class as it was no longer needed.
- Updated the MazeData class to improve output formatting.
- Added new assets for HUD background and foreground.
- Implemented Inventory class to manage crafting and item selection.
- Created HUDLayer class to handle drawing the HUD and inventory interactions.

game/hud/layer.rb

@@ -0,0 +1,21 @@
+require_relative "inventory"
+
+class HUDLayer
+  def initialize
+    @hud_bg = Gosu::Image.new("assets/images/hud.png", retro: true)
+    @hud_fg = Gosu::Image.new("assets/images/hud_fg.png", retro: true)
+    @inventory = Inventory.new
+  end
+
+  def draw
+    @hud_bg.draw(0, 0, Float::INFINITY)
+
+    @inventory.draw
+
+    @hud_fg.draw(0, 0, Float::INFINITY)
+  end
+
+  def button_down(id, pos)
+    @inventory.button_down(id, pos)
+  end
+end