Feature: Integrate Mistral AI Models into Serverless RAG Demo

[Fraser27]

With Bedrock's upcoming support for Mistral AI models, we have an opportunity to integrate these models into our serverless-rag-demo project. This integration would enable Retrieve and Generate (RAG) functionality over Mistral's AI capabilities. Given Mistral's strengths in summarization and text generation, adding its models to our project could significantly enhance the RAG experience and open up new use cases.
By leveraging Bedrock's serverless architecture, we can plug the Mistral models into our demo with minimal effort