Add: backend dir and moved frontend to frontend dir

frontend/src/components/NavBar/mobile/NavBarMobile.jsx

@@ -0,0 +1,41 @@
+import { useState } from 'react';
+import NavItem from '@/components/NavBar/NavItem';
+import LanguageButton from '@/components/LanguageButton';
+import '@/css/NavBarMobile.css';
+
+const NavBarMobile = ({ navItems }) => {
+  const [open, setOpen] = useState(false);
+
+  const handleClose = () => {
+    setOpen(false);
+  }
+
+  return (
+    <nav className="nav-container d-lg-none">
+      <div className="nav-mobile-header d-flex justify-content-between align-items-center">
+        {/* Por si algun dia se pone
+        <div className="nav-mobile-brand"></div>
+        */}
+        <button 
+          className={`nav-mobile-toggle ms-2 ${open ? 'open' : ''}`}
+          onClick={() => setOpen(!open)}
+        >
+          <span></span>
+          <span></span>
+          <span></span>
+        </button>
+      </div>
+
+      {open && (
+        <ul className="nav-list-mobile d-flex flex-column align-items-center list-unstyled m-0 w-100">
+          {navItems.map((item, index) => (
+            <NavItem key={index} item={item} onCloseNav={handleClose} />
+          ))}
+          <LanguageButton as="navitem" />
+        </ul>
+      )}
+    </nav>
+  );
+};
+
+export default NavBarMobile;