Problem with exchange abstraction

[calumrussell]

https://github.com/calumrussell/alator/blob/b2ff508da56daea3f8583ee3d44aa946e4785c28/crates/rotala/src/orderbook/fortuna.rs#L98

This implies that there is going to be something wrong with the exchange impl if we try to implement - #54 - a lot of the types were being passed through in uist but this becomes more tricky with fortuna as the order types are significantly more complex. Any client will bind to those types meaning that they need to be passed explicitly.

• Move Diana into Uist
• Move Fortuna into Jura
• Make sure PenelopeQuote doesn't leak.

Tests also overlap, we can just present single interface to test against