feat: Add dashboard and asignaturas routes with corresponding components

src/routes/_authenticated/dashboard.tsx

@@ -0,0 +1,9 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+export const Route = createFileRoute('/_authenticated/dashboard')({
+  component: RouteComponent,
+})
+
+function RouteComponent() {
+  return <div>Hello "/_authenticated/dashboard"!</div>
+}