Import functionality for wino accounts, calendar sync UI, bunch of shell improvements

Wino.Core.Domain/Interfaces/IWinoAccountDataSyncService.cs

@@ -0,0 +1,11 @@
+using System.Threading;
+using System.Threading.Tasks;
+using Wino.Core.Domain.Models.Accounts;
+
+namespace Wino.Core.Domain.Interfaces;
+
+public interface IWinoAccountDataSyncService
+{
+    Task<WinoAccountSyncExportResult> ExportAsync(WinoAccountSyncSelection selection, CancellationToken cancellationToken = default);
+    Task<WinoAccountSyncImportResult> ImportAsync(WinoAccountSyncSelection selection, CancellationToken cancellationToken = default);
+}