Add domain layer for GetEmailContent

lib/features/email/domain/extensions/email_extension.dart

@@ -0,0 +1,14 @@
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:model/email/email_content.dart';
+
+extension EmailExtension on Email {
+
+  EmailContent toEmailContent() {
+    return EmailContent(
+      id,
+      htmlBody: htmlBody,
+      attachments: attachments,
+      bodyValues: bodyValues
+    );
+  }
+}

lib/features/email/domain/extensions/presentation_email_extension.dart

@@ -0,0 +1,22 @@
+import 'package:intl/intl.dart';
+import 'package:model/model.dart';
+import 'package:core/core.dart';
+
+extension PresentationEmailExtension on PresentationEmail {
+
+  String getTimeSentEmail(String locale) {
+    if (sentAt != null) {
+      if (sentAt!.value.isToday()) {
+        return DateFormat('h:mm a', locale).format(sentAt!.value);
+      } else if (sentAt!.value.isYesterday()) {
+        return DateFormat('EEE', locale).format(sentAt!.value);
+      } else if (sentAt!.value.isThisYear()) {
+        return DateFormat('MMMd', locale).format(sentAt!.value);
+      } else {
+        return DateFormat('yMMMd', locale).format(sentAt!.value);
+      }
+    } else {
+      return '';
+    }
+  }
+}