John Deere 40 series v1.0.0.0

Description:
Added Grandpa Steps option while keeping the original Factory Steps available. *
Cleaned up Standard US wheel configuration behavior.
Updated Standard US rear rim setup to use a cleaner John Deere rim. *
Changed all variants to a normal era steering wheel. *
Removed unused wheel/shader files and duplicate shader references.
Removed unused texture/assets that were no longer referenced.
Cleaned up empty folders and unnecessary packaged files.
Resized large dirt/wear textures to reduce overall mod size.
