feat: adding MiniMax LLM provider (#5450)

* add MiniMax LLM provider support

* add MiniMax LLM provider to the docs

* fix: add trailing newlines for lint compliance

* add env vars to system settings | make max tokens configurable via ui | pass max tokens into minimax llm provider

* change fallback max tokens value to null to use provider default | pass max tokens into handleFucntionCallStream and chat

* add minimax to getModelTag switch

* pass provider into tooledStream and tooledComplete

* remove max tokens param

* update image

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Co-authored-by: angelplusultra <macfittondev@gmail.com>
Co-authored-by: Timothy Carambat <rambat1010@gmail.com>