[Feature] Multi item support

[Andre601]

Describe the Feature
It would be an interesting feature to have multi-item support.
What I mean by that is having the ability to sell more than one item per shop.

The shop menu could be updated to have navigation for it, to switch to the other item (See example screenshots below) and the item displayed on the shop (and also the sign) would be updated accordingly.
Perhaps the shop could cycle through the items on its own periodically. Like every 30 seconds or so, to show that it sells more than 1 item.

Screenshots

Additional context

[Ghost-chu]

basiclly is impossible because internal design.

[Ghost-chu]

Mark as v5 goal.