feat: Add Consulta_API page and routing, implement API request functionality

- Introduced a new page for API consultation (`Consulta_API`) with a form to send requests.
- Added routing for the new page and a 404 error page.
- Created a `MetodoSelect` component for selecting HTTP methods.
- Implemented a `MiBoton` component for a customizable button.
- Updated the `HomePage` layout to include a sidebar (`DoubleNavbar`) and main content area.
- Enhanced the `Welcome` component with a new greeting and description.
- Added a holographic shader background to the 404 error page.
- Updated dependencies in `yarn.lock` for new components and features.
- Styled the sidebar and main content for better user experience.

frontend/src/Router.tsx

@@ -1,11 +1,21 @@
 import { createBrowserRouter, RouterProvider } from 'react-router-dom';
 import { HomePage } from './pages/Home.page';
+import { Consulta_API } from './pages/Consulta_api';
+import { Error_404 } from './pages/404'; // Ajusta si está en otra carpeta
 
 const router = createBrowserRouter([
   {
     path: '/',
     element: <HomePage />,
   },
+  {
+    path: '/Consulta_API',
+    element: <Consulta_API />,
+  },
+  {
+    path: '*',
+    element: <Error_404 />,
+  },
 ]);
 
 export function Router() {