docs: Added MindsDB provider (#20322)
MindsDB integrates with LangChain, enabling users to deploy, serve, and
fine-tune models available via LangChain within MindsDB, making them
accessible to numerous data sources.
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Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>
Co-authored-by: Bagatur <baskaryan@gmail.com>
