include volume approximation

[Patrickens]

Is your feature request related to a problem? Please describe.
I am slicing a polytope into orthants and need to approximate the volume of each orthant to correct a likelihood computed for flux samples drawn from each orthant.

Describe the solution you'd like
It would be massively helpful if dingo would include volume computation

[Patrickens]

Also FYI: there is this package called PolyRound which also does polytope rounding, but does not include volume computation. I was trying to get the rounded polytopes from PolyRound into volesti for volume computations, but that has so far proven difficult.

Thanks for volesti & Dingo, looks like a lovely repo!