Future swap interface & workflows

[aristidesstaffieri]

We are planning to upgrade out swap in order to support Soroban protocols, so we need to redesign how swapping works in order to support this effort.

How do we display quotes?
How does a user select a quote?
How can a user configure which protocols they would like to use to quote/trade?(globally or per trade or both?)
How do we represent the current price and swap price?
How do we represent slippage?
How do we display the path if it includes intermediary tokens when using protocols that support that kind of trade path?