Add xlsx support and enhance Trabajadores module with file upload functionality

- Updated package.json and package-lock.json to include xlsx dependency.
- Enhanced AlumnosService to return UsuarioData type.
- Modified CuestionarioRespondidoService to include event start and end dates in responses.
- Updated TrabajadoresController to add file upload endpoint for processing Excel files.
- Implemented file processing logic in TrabajadoresService to handle worker registration from Excel.
- Created TrabajadorApiDocumentation for API documentation of the new file upload feature.
- Refactored RegistroTrabajador entity to include carrera field and changed num_trabajador type.

package.json

@@ -44,7 +44,8 @@
     "qrcode": "^1.5.4",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
-    "typeorm": "^0.3.21"
+    "typeorm": "^0.3.21",
+    "xlsx": "^0.18.5"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",