refactor: rename Materia to Asignatura across the codebase

- 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

src/routes/planes/$planId/_detalle/route.tsx

@@ -223,7 +223,7 @@ function RouteComponent() {
               Mapa Curricular
             </Tab>
             <Tab to="/planes/$planId/asignaturas" params={{ planId }}>
-              Materias
+              Asignaturas
             </Tab>
             <Tab to="/planes/$planId/flujo" params={{ planId }}>
               Flujo y Estados