Auto generation of product code SKU OpenCart

Module for automatic generation of product SKU code on OpenCart 2 and 3.

When adding a product, a numeric 10-digit SKU code with a prefix will be automatically generated, such as SKU-0237451236. The prefix can be changed to any value by changing the ocmod file before installing the add-on. Also, the SKU is created when editing for products that do not have this code filled in.