v1.12 Document lookup, model updates

Update your image with:

docker pull promptpanel/promptpanel:1.12

and then re-create your container.

Features

• Added Mistral open, Mistral Codestral models.
• Added Gemini Flash 1.5 to universal models.

Enhancements

• Bumped requirements.
• Refactored RAG plugin to be compatible with more models.
• Breaking: RAG system rename to Document Lookup.