Add TanStack DB + TanStack Query (React) example

Author: dipiash

src/App.tsx

@@ -43,7 +43,7 @@ const UsersTable = () => {
                 {u.first_name} {u.last_name}
               </td>
               <td>
-                <button onClick={() => patchUser({ id: u.id, patch: { first_name: 'Alice' } })}>Rename to Alice (optimistic)</button>
+                <button onClick={() => patchUser({ id: u.id, patch: { first_name: 'UPDATED' } })}>Rename to UPDATED (optimistic)</button>
               </td>
             </tr>
           ))}