Feature Request: Add Support for Mistral (and/or update OpenAI description)

[natrius]

Hello, thanks for the app! :)

I found #89 where the suggestion was "just use OpenAI" foir Mistral. Thats alright with me, but I think Mistral deserves its own entry, espacially since its currently the biggest AI provider from Europe and performs really well.

I suggest adding Mistral as separate provider in the list, or if thats not yet possible, updating the OpenAI description to clarify its support of Mistral. For Example "OpenAI - ChatGPT, supports Mistral".
Updating the API-URL-hing from "The url must end with a '/'. to "The url must end with a '/v1/'." At least thats what i understood from #89 and seems to be correct for OpenAI as well?

Thanks for considering, let me know if you need any additional details.