Add Mistral provider

[Viicos]

Part of #1073.

[hyperlint-ai]

PR Change Summary

Added support for the Mistral provider in the documentation, enhancing the API integration details.

• Introduced LatestMistralModelNames for listing popular Mistral models.
• Replaced api_key argument with provider argument for model initialization.
• Provided examples for using MistralProvider with and without a custom HTTP client.

Modified Files

• docs/models.md

---

How can I customize these reviews?

Check out the Hyperlint AI Reviewer docs for more information on how to customize the review.

If you just want to ignore it on this PR, you can add the hyperlint-ignore label to the PR. Future changes won't trigger a Hyperlint review.

Note specifically for link checks, we only check the first 30 links in a file and we cache the results for several hours (for instance, if you just added a page, you might experience this). Our recommendation is to add hyperlint-ignore to the PR to ignore the link check for this PR.

What is Hyperlint?

Hyperlint is an AI agent that helps you write, edit, and maintain your documentation.

Learn more about the Hyperlint AI reviewer and the checks that we can run on your documentation.

[github-actions]

Docs Preview

commit:	f505b97
Preview URL:	https://e7beec39-pydantic-ai-previews.pydantic.workers.dev