TF-2387 Handle sign in SAAS platform

lib/features/starting_page/domain/state/sign_in_saas_state.dart

@@ -0,0 +1,21 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:model/oidc/oidc_configuration.dart';
+import 'package:model/oidc/token_oidc.dart';
+
+class SignInSaasLoading extends LoadingState {}
+
+class SignInSaasSuccess extends Success {
+  final TokenOIDC tokenOIDC;
+  final Uri baseUri;
+  final OIDCConfiguration oidcConfiguration;
+
+  SignInSaasSuccess(this.tokenOIDC, this.baseUri, this.oidcConfiguration);
+
+  @override
+  List<Object> get props => [tokenOIDC, baseUri, oidcConfiguration];
+}
+
+class SignInSaasFailure extends FeatureFailure {
+  SignInSaasFailure(dynamic exception) : super(exception: exception);
+}