feat: hecha la parte de gestion de propiedades en venta

Front/src/Componentes/NavBarLogin.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
     import { Navbar, NavbarBrand, NavbarToggler, NavItem, Nav, NavLink, Collapse } from "@sveltestrap/sveltestrap";
     
-    let isOpen:boolean = false;
+    let isOpen:boolean =$state(false);
     let theme = $state(localStorage.getItem("theme") ?? "light"); 
   const toggleTheme = () => {
     theme = theme === "light" ? "dark" : "light";