TF-1718 Check List-Unsubscribe in header of email & parsing to EmailUnsubscribe

(cherry picked from commit 9dc046a951e5198461178860c8ebe4bedff9062f)

lib/features/email/presentation/model/email_unsubscribe.dart

@@ -0,0 +1,19 @@
+
+import 'package:equatable/equatable.dart';
+
+class EmailUnsubscribe with EquatableMixin {
+
+  final List<String> httpLinks;
+  final List<String> mailtoLinks;
+
+  EmailUnsubscribe({
+    required this.httpLinks,
+    required this.mailtoLinks
+  });
+
+  @override
+  List<Object?> get props => [
+    httpLinks,
+    mailtoLinks
+  ];
+}