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

Wino.Core.Domain/Models/Accounts/WinoAccountSyncExportResult.cs

@@ -0,0 +1,8 @@
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed class WinoAccountSyncExportResult
+{
+    public bool IncludedPreferences { get; init; }
+    public bool IncludedAccounts { get; init; }
+    public int ExportedMailboxCount { get; init; }
+}