TF-60 Add domain get device contact suggestion

model/lib/contact/contact.dart

@@ -0,0 +1,17 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
+
+abstract class Contact with EquatableMixin {
+  final String displayName;
+  final String email;
+
+  Contact(this.displayName, this.email);
+
+  @override
+  List<Object> get props => [displayName, email];
+}
+
+extension ContactExtension on Contact {
+  EmailAddress toEmailAddress() => EmailAddress(displayName, email);
+}

model/lib/contact/device_contact.dart

@@ -0,0 +1,10 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:model/contact/contact.dart';
+
+class DeviceContact extends Contact implements EquatableMixin {
+  DeviceContact(String displayName, String email) : super(displayName, email);
+
+  @override
+  List<Object> get props => super.props;
+}