fix(service-worker): enhance unregister logic and update index.html

- Updated the index.html to load the env-config.js script as a module for better compatibility.
- Improved the unregister logic in both the unregister-sw.js and login-page.tsx to specifically target the ngsw-worker, ensuring it is unregistered correctly and the page reloads afterward. This prevents multiple unregister attempts and enhances user experience.

worklenz-frontend/src/pages/auth/login-page.tsx

@@ -77,6 +77,18 @@ const LoginPage: React.FC = () => {
   };
 
   useEffect(() => {
+    // Check and unregister ngsw-worker if present
+    if ('serviceWorker' in navigator) {
+      navigator.serviceWorker.getRegistrations().then(function(registrations) {
+        const ngswWorker = registrations.find(reg => reg.active?.scriptURL.includes('ngsw-worker'));
+        if (ngswWorker) {
+          ngswWorker.unregister().then(() => {
+            window.location.reload();
+          });
+        }
+      });
+    }
+
     trackMixpanelEvent(evt_login_page_visit);
     if (currentSession && !currentSession?.setup_completed) {
       navigate('/worklenz/setup');