- Updated type definitions and interfaces to replace 'Materia' with 'Asignatura'.
- Refactored components and routes to reflect the new naming convention.
- Adjusted related types and constants for consistency.
- Removed the old Materia type definition and added Asignatura type definition.
- Ensured all references in UI components and logic are updated accordingly.
fix#50
close#44:
Se creó la NotFoundPage y se utiliza en __root con el notFoundComponent.
Se agregó la lógica del loader tanto de plan de estudios como de asignaturas.
Se agregó el NotFoundComponent para el detalle de plan de estudios y el de asignaturas
