Add subdirectory functionality for compilation

[IceDynamix]

• menu
  • information.lua
  • cubic-bezier.lua

should result in

menu = {}
-------------------------------------------------------------------------------------
-- modules\menu
-------------------------------------------------------------------------------------

-- <content from information.lua>

-- <content from cubic-bezier.lua>

This would allow for a menu to be split up into different functions without too much chaos in a single file containing all menus