Create mistral_embedding_function.py

[OliverIost]

Working with actual (2024-12) mistral python api

Description of changes

Summarize the changes made by this PR.

• Use ChromaDB with mistral.ai embeddings

Test plan

How are these changes tested?

Just using it with actual version of chromadb on my server. I'm not so familiar with python, sorry. But as I needed this functionality it was possible to re-arrange the code of ishaksebsib

[github-actions]

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Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
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Quality

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