Implement conformal prediction RAPS

[beckynevin]

https://colab.research.google.com/github/aangelopoulos/conformal_classification/blob/master/example.ipynb

Adapt the above to regression

Maybe also implement it as a wrapper for analyzing how mis-calibrated the other UQ techniques are.

[beckynevin]

Also here - https://github.com/aangelopoulos/conformal_classification?tab=readme-ov-file

[beckynevin]

Verify that what I have currently is from the gentle introduction paper and cite - https://arxiv.org/abs/2107.07511