feat: Add Dynamic RAG_K Configuration to Enhance RAG and Improve Cont…

[abdalrohman]

This pull request introduces several enhancements to the Retrieval Augmented Generation (RAG) system and the user interface. Specifically:

• Contextual Prompts: The prompts have been modified to emphasize the utilization of information from retrieved documents for more accurate and informative answers.
• RAG_K Parameter Update: An endpoint has been created to allow adjusting the RAG_K parameter, which controls the number of documents to retrieve for answering queries.
• UI Integration for RAG_K: The user interface has been updated to display and control the RAG_K parameter, providing flexibility and control over the RAG behavior.

Detailed Changes:

• createContextHandlers.js: Added instructions for the LLM to prioritize information from documents, use an unbiased tone, and handle entity disambiguation.
• createContextHandlers.js: The RAG_K parameter is fetched from the server, allowing dynamic adjustment based on user input.
• server/index.js & server/routes/index.js: A new route (/api/update-ragk) has been added to handle updates to the RAG_K parameter.
• PanelTable.tsx: A slider has been added to the user interface to visualize and control the RAG_K parameter. The value is persisted in the backend and fetched upon component initialization.