aggiunto schermate login e register

lib/myApp.dart

@@ -4,13 +4,13 @@ import 'navigation.dart';
 class MyApp extends StatelessWidget {
   const MyApp({ Key? key }) : super(key: key);
 
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       title: 'My App',
       theme: ThemeData(
-        useMaterial3: true,
-        primaryColor: Colors.red,
+        useMaterial3: true
       ),
       home: Navigation()
     );