Add support for Hit and Run for general densities

[papachristoumarios]

Describe the solution you'd like

Adapt the existing functionality of volesti for hit-and-run walk (both randomized and coordinate directions versions) to support arbitrary target densities, e.g. log-concave.

The current support include uniform and Gaussian densities.

[JRS296]

Hello there, can you tell me more about the problem at hand? @papachristoumarios @vissarion

[vissarion]

Hi @JRS296 thanks for your interest I do not know if this issue is still needed, it is quite old and we have new sampling methods from log concave densities. @papachristoumarios @TolisChal what do you think? I propose to choose one issue from https://github.com/GeomScale/volesti/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22

[JRS296]

Sure, will check out the link 👍

[TolisChal]

Yes, agreed