Implement AI ChatBot Feature

[AyshaVolidis]

This PR introduces the AI ChatBot feature for the application, allowing users to interact with an AI mentor in real-time. Key updates include:

Features:

• Integrated AI-powered chat using the backend API.
• Real-time message updates in the chat window.
• User messages and AI responses are visually distinguished.
• Handles dynamic updates of messages without requiring a page refresh.

Next Steps / Improvements:

• Implement auto-scrolling to the latest message.
• Add message timestamps and read indicators.
• Add typing indicator for AI responses.
• Consider splitting long AI responses into paragraphs for better readability.