Support for Estimator and Sampler Interfaces

[samanthavbarron]

It would be useful to have QuimbEstimator and QuimbSampler classes that implement the estimator/sampler interfaces, i.e. one could use QuimbEstimator.run(est_pubs: list[EstimatorPub]) -> EstimatorResult and similarly with QuimbEstimator.

This would lower the barrier for entry for someone who wants to try using this repo, and it seems like most of the pieces are already here to do this.