Support for more low-rank curvature approximations

[Thomas-Christie]

Hi - thanks for the library. I'm currently wanting to run some experiments using low-rank curvature approximations for regression. As far as I can tell, currently only the AsdfghjklHessian backend can be used for low-rank Laplace. I'm working with linearised Laplace, so would like to obtain a low-rank representation of the GGN. Am I correct in thinking that this isn't currently supported? If not, I propose adding support for this via the CurvLinopsGGN curvature backend. Does this seem reasonable and is it a feature you would like to have added?

[wiseodd]

Hi Thomas, yes, this is currently not supported. At the current moment, this repo does not have an active maintainer. Not sure about the others, but I do not have time even for just reviewing PRs, unfortunately.