[MRG] Add mistralai support

[suryavanshi]

• Added support for MistralAI SDK
• The Mistral model (test with - mistral-large-latest) doesn't always return json, so also added a function to use regex to get proper json.
• Also found a bug here -

  MLE-agent/mle/agents/advisor.py

  Line 188 in 8109d8b

  return

  - currently when providing a dataset its getting set to 'None'

[HuaizhengZhang]

wow. thanks for your contribution. expect to merge it.

ping us and add [MRG] if your pr is ready to be reviewed.

[huangyz0918]

Would you like to follow this up? @leeeizhang

[leeeizhang]

Would you like to follow this up? @leeeizhang

yes, i will improve some details and test it soon.

[suryavanshi]

wow. thanks for your contribution. expect to merge it.

ping us and add [MRG] if your pr is ready to be reviewed.

Thanks, I think mistral json mode doesn't always work, so looking into it.

[leeeizhang]

LGTM

[huangyz0918]

Thank you! 👍 @suryavanshi