Properties of CommodityMark and Codes for Modifiers

Properties CommodityMark and Codes have been added for modifiers in IOrderModifierItem.

The CommodityMark property already existed in SyrveFront entities but was not available through the API. It is now exposed in the API, allowing plugins to work with product labeling for modifiers.

Additionally, the Codes property has been added to work with labeling codes for modifiers.