Add Example for Legal RAG with Milvus

[stephen37]

This PR introduces an example of how to deal with LegaL RAG with Milvus. It is using Voyage AI Law embedding models as those are specifically trained on legal data.

• A reference to a related issue in your repository.

  Each PR is related to an issue, and you need to list that issue.

• A description of the changes proposed in the pull request.

  A brief introduction to this PR.

• Add delight to the experience when all tasks are complete 🎉

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: stephen37

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codingjaguar]

The code LGTM. As a notebook, I think it lacks some verbal explaination to make it a story. E.g. at the very begining, there could be explaination of typical RAG architecture. Then a brief touch on applying RAG on legal field and its practical benefit in business. Then some words on what's specially about this legal dataset.

[stephen37]

@codingjaguar I added more context to the notebook, it's way better now :D