Refactor email processing with move queue integration

Updated `Program.cs` to register `EmailMoveQueue` and `IEmailMoveQueue` for managing email move operations. Refactored `EmailMonitoringService.cs` to improve email processing and connection handling, and to utilize the new move queue. Simplified `EmailMover.cs` by decoupling IMAP interactions and leveraging the move queue. Introduced `EmailMoveOperation` and `EmailMovedEventArgs` classes in `EmailMoveQueue.cs` to manage move operations and events. Overall, these changes enhance the modularity and scalability of the email processing system.

Author: Timothy Dodd

src/MailZort/Program.cs

@@ -42,6 +42,8 @@ static async Task Main(string[] args)
                 services.AddSingleton<IEmailHandler, EmailHandler>();
                 services.AddSingleton<RuleMatcher>();
                 services.AddSingleton(x => settingHelper);
+                services.AddSingleton<EmailMoveQueue>(); // Singleton to share state
+                services.AddSingleton<IEmailMoveQueue>(provider => provider.GetService<EmailMoveQueue>()!);
                 // Register the background service
                 services.AddHostedService<EmailMonitoringService>();