Add binary scoring

[sumukshashidhar]

Add a very simple LLM as a judge, which involves binary scoring of responses, whether or not they align with the produced ground truth answer. Intended only for purely factual questions

[clefourrier]

I'm not fond of having eval code in yourbench itself as we want to showcase it as a dataset generation library, and I feel it could muddle the point - but if people ask for it we can add it later

[sumukshashidhar]

hmm, but this would be a simple (binary) way to test out a given model. it would simplify the entire end to end pipeline for LLM evals particularly