Added new SuperPay terms

SuperPay related updates

1. SuperPay Payment Method:

   • payment.method field has been updated to support SuperPay. Set it as superpay to create or modify an order with SuperPay.

2. SuperPay Payment Terms:

   • When using SuperPay (payment.method as superpay), payment.terms should be one of the following values:
     • 1_3_days - 1-3 Business days
     • 5_days - 5 Business days
     • 10_days - 10 Business days
     • 15_days - 15 Business days
     • 20_days - 20 Business days

3. Temporary Usage of superpay Payment Terms:

   • Until August 1, 2023, superpay is still accepted as a value for payment.terms and be replaced with 1_3_days on our side.
   • Replace superpay with the appropriate replacement values before the deprecation deadline.