Create an addin in 'Rstudio' to do fill-in-the-middle (FIM) and chat with latest Mistral AI models for coding, 'Codestral' and 'Codestral Mamba'. For more details about 'Mistral AI API': < https://docs.mistral.ai/getting-started/quickstart/> and < https://docs.mistral.ai/api/>. For more details about 'Codestral' model: < https://mistral.ai/news/codestral>; about 'Codestral Mamba': < https://mistral.ai/news/codestral-mamba>.