[WIP] LLM judge

[tahaEntesari]

What does this PR do?

This PR adds LLM as a judge functionality to this repository.
We utilized this functionality in our recent [paper](Constrained Entropic Unlearning: A Primal-Dual Framework for Large Language Models)

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Have you gone through the contributions guide?
• Are your changes documented? Read documentation guidelines here.