Adding new RAG Chatbot example with llamaGuard and Alignscore integration

[abodhankar]

LlamaGuard Alignscore Integration with RAG

[abodhankar]

@drazvan for review

[drazvan]

Thanks, @abodhankar!

Generally, looks good. However, there are a few issues to solve before we'd be able to merge:

• currently there is no documentation
• the code is not a bot, so it should not be placed under examples/bots
• given there's also an ingestion part, this would be a better fit for a notebook; the notebook would explain the goal, the ingestion part, and then adding the guardrails; you can place it in examples/notebooks;
• the config itself (without the python files) can be placed under examples/configs; the notebook can copy it from there;
• including a 200 pages PDF in the repository is not recommended; can this be downloaded dynamically from somewhere? You can add this part to the notebook as well.
• only one commit seems to be signed. Please configure signing the commits as per the contributing guidelines, and then rebase on top of the develop branch.
• make sure you link to the documentation about setting up the AlignScore server.

I'll review again once the above points have been addressed.

[abodhankar]

@drazvan Made all the changes as per request.