Add other asset types for pricing

[barnjamin]

USDC, USDT, other stablecoins?

[DarkSheepStudio]

Just for the record from our conversation:

Option to select and use price in native tokens of Algo network - For example USDC and others tokens running on Algo network (It's a question of each seller's preference which he wants to use if platform enabled payments via that token.)

[barnjamin]

https://github.com/barnjamin/rareaf/tree/price-tokens addressing in this branch