Include Mistral AI

[nhdez]

Hello,

First of, congratulations, this is a really nice addition to the Ruby ecosystem. Thank you!

The included models are very nice, I just thought it would be nice to have Mistral added, since they also have some powerful features and have some really nice tokenomics.

Again, amazing work, thanks for this Gem!

[OriPekelman]

Started a branch here: https://github.com/OriPekelman/ruby_llm/tree/mistral partially functional. Tool calling is failing and I didn't spend much time on getting the whole multi-modal vibe going.

[crmne]

Great to see community interest in Mistral! 🇪🇺 I'm looking forward to seeing that PR come through. Would be a fantastic addition to the library.

[OriPekelman]

Nice that you have interest in this :)

1. I'll align the testing strategy with yours (maybe we want to be able to test providers separately, so you don't have to have api keys for all.... We could in

   ruby_llm/spec/ruby_llm/chat_spec.rb

   Line 11 in 0f3eb66

   'claude-3-5-haiku-20241022',

   and similar filter for only "present" API keys and have a single failing test for not all api keys present. Or just a warning .
2. Figure-out the vision and other APIs, the basics are there.
3. What else would you have me do? If you are interested I can try to add some functionality. My favorite is fine-tuning:) if interested I'll open a separate issue for that to figure the API

[OriPekelman]

Pull request opened on PR #43