Customizing the RefundProcess

[michaelbromley]

Discussed in #2433

^{Originally posted by monrostar October 9, 2023}
When developing multivendors we faced the problem that we were limited in modifying refunds from multivendors’ channels, if we wanted to limit any refunds that involved local banks and required verification from the main channel.

I think it would be a good idea to create the same refund process as the Order or Payment to customize the refund flow.

@michaelbromley @martijnvdbrug