Added placeholder for lastName and role addition functionality

Try to rebase

frontend/pweb/lib/main.dart

@@ -19,6 +19,7 @@ import 'package:pshared/provider/invitations.dart';
 import 'package:pshared/service/payment/wallets.dart';
 
 import 'package:pweb/app/app.dart';
+import 'package:pweb/pages/invitations/widgets/list/view_model.dart';
 import 'package:pweb/app/timeago.dart';
 import 'package:pweb/providers/carousel.dart';
 import 'package:pweb/providers/operatioins.dart';
@@ -85,6 +86,9 @@ void main() async {
           create: (_) => InvitationsProvider(),
           update: (context, organizations, provider) => provider!..updateProviders(organizations),
         ),
+        ChangeNotifierProvider(
+          create: (_) => InvitationListViewModel(),
+        ),
         ChangeNotifierProxyProvider<OrganizationsProvider, WalletsProvider>(
           create: (_) => WalletsProvider(ApiWalletsService()),
           update: (context, organizations, provider) => provider!..update(organizations),