feat: add page items

frontend/src/App.jsx

@@ -8,6 +8,7 @@ import NotFoundPage from "./pages/NotFoundPage";
 import Contact from "./pages/Contact";
 import Cart from "./pages/Cart";
 import Profile from "./pages/Profile";
+import ItemPage from "./pages/ItemPage";
 
 const PrivateRoute = ({ children }) => {
   const token = localStorage.getItem("token");
@@ -37,6 +38,7 @@ export default function App() {
             </PrivateRoute>
           }
         />
+        <Route path="items/:id" element={<ItemPage />} />
         <Route path="*" element={<NotFoundPage />} />
       </Routes>
     </BrowserRouter>