Refactor input handling: replace hardcoded key inputs with configurable key bindings for character movement, inventory navigation, and actions; enhance settings scene with key rebind functionality and add credits scene.

game/props/base.rb

@@ -49,7 +49,7 @@ class Prop
   end
 
   def update(dt)
-    return unless Gosu.button_down?(Gosu::MS_LEFT) || Gosu.button_down?(Gosu::KB_X)
+    return unless Gosu.button_down?(Gosu::MS_LEFT) || Gosu.button_down?($bus.get(:settings, :break))
 
     player_x, player_y = $bus.get(:player_position) || [0, 0]
 

game/props/handler.rb

@@ -122,7 +122,7 @@ class PropsHandler
         @grid.delete([prop.x, prop.y])
       end
     end
-    if Gosu.button_down?(Gosu::KB_P) # place selected if it is a placeable item
+    if Gosu.button_down?($bus.get(:settings, :place))
       selected_item = $bus.get(:selected_item)
       if selected_item == :torch
         player_x, player_y = $bus.get(:player_position) || [0, 0]