Add Session History Feature for the Video RAG Chat Interface

[bashirmoham]

Description

This pull request adds a session history feature to the get_formatted_prompt function. The changes include updating the function to accept and utilize the history parameter and ensuring that the user's previous chat history is incorporated into the prompt formatting process.

Changes Made

• Added get_history function to retrieve the last three messages from the session state
• Added the history parameter to the get_formatted_prompt function signature.
• Assigned the history variable within the template rendering process to maintain correct scope and functionality.
• Included placeholders for scene description, user's previous chat history, and user's question.
• Added rules for the assistant to follow while answering questions based on the provided scene description and history.

Type of change

List the type of change like below. Please delete options that are not relevant.

• New feature (non-breaking change which adds new functionality)

Dependencies

List the newly introduced 3rd party dependency if exists.

Tests

Tested and now showing the history.