Duplicate fixed point logic in Cubit to allow for matching distance calculations

[clexmond]

Currently calculating distance in js in the SDK vs Cairo onchain results in slightly different values. Sometimes this can result in miscalculating lease rates, or other values. Ideally we could mimic (using BigInt math) the logic in acos_fast here https://github.com/influenceth/cubit/blob/main/src/f64/math/trig.cairo#L29 to do so.

[fishonamos]

Let me work on this @clexmond .

[Chvx]

I can give this a try :)

[chachaleo]

Hey, if no one is still working on this I'd love to take it :)