[16.0][ADD] add rma_reason & sale_rma_reason

[sbejaoui]

Specifying the RMA reason when creating an RMA order is crucial for effective inventory management, quality control, and customer service. It helps categorize returned items accurately, identify recurring product issues, and improve overall product quality. This data enables customer service to address issues more effectively and enhances the customer experience.

This addon allows RMA managers to pre-configure possible reasons users can specify when creating the RMA order.

fixes #405

needs: #410

cc/ @jbaudoux , @lmignon , @rousseldenis