Mejoras en estructura y documentación del repositorio

[google-labs-jules]

Se han realizado las siguientes mejoras en el repositorio:

1. Limpieza y consolidación del README.md, eliminando contenido duplicado y mejorando la estructura.
2. Creación del archivo requirements.txt incluyendo pytest.
3. Creación de la estructura de carpetas para los módulos faltantes (05, 06, 07, 08) con archivos README provisionales.
4. Adición de una carpeta tests/ con un ejemplo básico de prueba unitaria.

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PR created automatically by Jules for task 8053160503131072364 started by @Takzuin

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