This commit provides a comprehensive update to the README.md file.
The previous version was outdated and did not accurately represent the project's structure or architecture after the implementation of the JSON-based flow engine.
Key changes:
- Rewrites the "Arquitectura Técnica" section to be simpler and more accurate.
- Updates the "Estructura del Proyecto" diagram to be a perfect representation of the current file and module structure.
- Corrects the `git clone` URL in the installation instructions.
- Harmonizes file names (e.g., `google_key.json`) across the documentation and configuration to avoid confusion.
- Simplifies and clarifies the setup and execution instructions.
