Project documentation update
This merge request introduces the full project documentation and improves the repository structure in accordance with the Medallion architecture and evaluation criteria.
Added a complete README.md:
- Project description and objectives
- Detailed structure of Bronze/Silver/Gold layers
- Setup instructions and environment configuration
- Step-by-step execution pipeline
- Explanation of notebooks and visualization logic
This MR aims to make the project easier to understand, maintain, and reproduce for both team members and evaluators.