Feat/integ http

[nik-lylo]

This PR introduces several significant enhancements to the application:

Core Features:

• Lazy Loading for Messages: Optimizes performance by loading chat messages incrementally as the user scrolls up, reducing initial load time and improving responsiveness.
• Mock Chat Messages: Facilitates testing and development without relying on external services.
• Related Questions Block: Enhances user experience by providing relevant questions and answers.
• AppFlowy Editor Integration: Enables seamless integration with the AppFlowy editor. (Disabled, as editor caused unexpected behavior)

Refactoring and Optimization:

• MessageAI and onSubmit Handler Refactoring: Improves code readability and maintainability.

Technical Improvements:

• HTTP Service Integration: Adds a foundational HTTP service for future API interactions.
• Loader on Initialization: Provides visual feedback during initial loading.