Wrap cuDensityMat

[kshyatt]

It's a relatively new addition to cuQuantum.

[jack-champagne]

Hey @kshyatt! I have been working on this for some of the stuff we do. I know that cuTensorNet and cuStateVec and cuPaulis are already in here but I needed to get a little proof of concept going locally and it kindof ballooned 😅 - perhaps we can coordinate and talk? I already have some preliminary benchmarks with my wrapped version.

[kshyatt]

Sure, would be happy to help! Are you on Julia slack? Feel free to just take this over, I will not get to it in the near term