Merge read receipt tracking work

Wino.Core.Domain/Interfaces/IMailItemDisplayInformation.cs

@@ -24,4 +24,7 @@ public interface IMailItemDisplayInformation : INotifyPropertyChanged
     bool ThumbnailUpdatedEvent { get; }
     bool IsThreadExpanded { get; }
     AccountContact SenderContact { get; }
+    bool HasReadReceiptTracking { get; }
+    bool IsReadReceiptAcknowledged { get; }
+    string ReadReceiptDisplayText { get; }
 }

Wino.Core.Domain/Interfaces/ISentMailReceiptService.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using MimeKit;
+using Wino.Core.Domain.Entities.Mail;
+
+namespace Wino.Core.Domain.Interfaces;
+
+public interface ISentMailReceiptService
+{
+    Task PopulateReceiptStateAsync(MailCopy mailCopy);
+    Task PopulateReceiptStatesAsync(IReadOnlyCollection<MailCopy> mailCopies);
+    Task TrackSentMailAsync(MailCopy mailCopy, MimeMessage mimeMessage = null);
+    Task ProcessIncomingReceiptAsync(MailCopy receiptMail, MimeMessage mimeMessage);
+}