Changes

The '''accessory_addon_data''' unit class is used for vehicle accessories that adds which add a visible component to a vehicle. This is most commonly used for customization of the [[Documentation/Engine/Game_data/Player_trucks_definitions|player's vehicle]]. It defines the paths to the visible models and their configuration (variant, look, excluded views), and the path to the collision mesh if applicable. Units of this type are found in '''/def/vehicle/truck/<brand.model>/accessory/<type>/*.sii'''.{{Note|Some legacy accessories which don't directly interact with the player (eg. badges) may also be found in '''def/vehicle/truck/<brand.model>/<type>/*.sii''' because of legacy. So when creating new types always create them inside '''accsessoryaccessory''' subfolder.}}