closes odoo/odoo#106779

Signed-off-by: Trinh Jacky (trj) <trj@odoo.com>

* Allow multiple loyalty programs.
* Improve gift card workflow: https://app.excalidraw.com/l/65VNwvy7c4X/1Xt93llULvo
* Integration with the ewallet programs: https://app.excalidraw.com/l/65VNwvy7c4X/4B9AEOSbaku



Note that we prevent refunding eWallet and gift card top up and
reward products. If for instance the user wants to refund gift cards
they'll have to transfer the gift card to ewallet by topping up the
customer's ewallet and paying with the gift card to be refunded.

closes odoo/odoo#99559

Task-ids: 2959620, 2959661
Signed-off-by: Trinh Jacky (trj) <trj@odoo.com>

This module was moved from enterprise to community and now includes
pos_coupon and pos_gift_card aswell.

TaskId-2675382