Add support for Mistral LLM

[JGJones]

I like the Codestral LLM for help with coding etc so I would like to use this model. Would be grand if support for their API can be added.

[eharris128]

Thanks for raising the issue.

I will check out how integrating their API looks.

[eharris128]

For reference:

• Release post - https://mistral.ai/news/codestral-2501
• PoC example - https://docs.mistral.ai/capabilities/code_generation/