TF-548 Create some object for contact

contact/lib/contact/model/contact.dart

@@ -0,0 +1,7 @@
+
+import 'package:equatable/equatable.dart';
+
+abstract class Contact with EquatableMixin {
+  @override
+  List<Object?> get props => [];
+}

contact/lib/contact/model/contact_filter.dart

@@ -0,0 +1,21 @@
+import 'package:jmap_dart_client/jmap/core/filter/filter.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'contact_filter.g.dart';
+
+@JsonSerializable()
+class ContactFilter extends Filter {
+
+  final String text;
+
+  ContactFilter(this.text);
+
+  factory ContactFilter.fromJson(Map<String, dynamic> json) =>
+      _$ContactFilterFromJson(json);
+
+  @override
+  Map<String, dynamic> toJson() => _$ContactFilterToJson(this);
+
+  @override
+  List<Object?> get props => [text];
+}

contact/lib/contact/model/tmail_contact.dart

@@ -0,0 +1,36 @@
+
+import 'package:contact/contact/model/contact.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'tmail_contact.g.dart';
+
+@JsonSerializable()
+class TMailContact extends Contact {
+
+  final String id;
+  final String emailAddress;
+
+  @JsonKey(includeIfNull: false)
+  final String? firstname;
+
+  @JsonKey(includeIfNull: false)
+  final String? surname;
+
+  TMailContact(
+    this.id,
+    this.firstname,
+    this.surname,
+    this.emailAddress);
+
+  factory TMailContact.fromJson(Map<String, dynamic> json) =>
+      _$TMailContactFromJson(json);
+
+  Map<String, dynamic> toJson() => _$TMailContactToJson(this);
+
+  @override
+  List<Object?> get props => [
+    id,
+    firstname,
+    surname,
+    emailAddress];
+}