Feature request - Please add gpt-4o-mini support

[cheddarking]

Awesome project! I am excited at the possibilities for new applications.

For multimodal LLMs please add gpt-4o-mini as it is significantly cheaper than gpt-4o.

Currently I am getting this error when trying to use it:

ValueError: The engine provided is not multimodal. Please provide a multimodal engine, one of the following: ['gpt-4-turbo', 'gpt-4o', 'claude-3-5-sonnet-20240620', 'claude-3-opus-20240229', 'claude-3-sonnet-20240229', 'claude-3-haiku-20240307', 'gpt-4-turbo-2024-04-09']

Thanks

[sciftlikci]

Also It would be nice to support Azure Open AI API as a multimodal model.