- Renamed `domain/` to `business/` to better reflect the organization of code by business logic.
- Updated all relevant file paths and references throughout the project to align with the new structure.
- Ensured that all models and services are now located under the `business/` directory, maintaining existing functionality while improving clarity.
- Created a new `docs/planning/` directory to better organize architecture and implementation planning documents.
- Moved existing planning documents into the new directory for improved accessibility.
- Updated `README.md` to reflect the new document structure and added references to the organized planning documents.
- Enhanced overall documentation management for easier navigation and maintenance.