feat: add admin management page and types

- Implemented the admin management page with a table displaying admin details.
- Created the Administrador type definition for better type safety.
- Added SubmitResponse type for handling submission responses.
- Included placeholder components for form card previews.

src/utils/api-config.ts

@@ -14,4 +14,46 @@ const axiosInstance = axios.create({
   },
 });
 
+// Request interceptor para agregar el token de autenticación
+axiosInstance.interceptors.request.use(
+  (config) => {
+    // Obtener el token del sessionStorage
+    const token = sessionStorage.getItem('token');
+
+    if (token) {
+      config.headers.Authorization = `Bearer ${token}`;
+    }
+
+    return config;
+  },
+  (error) => {
+    return Promise.reject(error);
+  }
+);
+
+// Response interceptor para manejar errores de autenticación
+axiosInstance.interceptors.response.use(
+  (response) => {
+    return response;
+  },
+  (error) => {
+    // Si el token ha expirado o es inválido (401)
+    if (error.response?.status === 401) {
+      // Limpiar el sessionStorage
+      sessionStorage.removeItem('token');
+      sessionStorage.removeItem('user');
+
+      // Redireccionar al login solo si no estamos ya en la página de login
+      if (
+        typeof window !== 'undefined' &&
+        !window.location.pathname.includes('/login')
+      ) {
+        window.location.href = '/login';
+      }
+    }
+
+    return Promise.reject(error);
+  }
+);
+
 export default axiosInstance;