Add initial mail sync range selection

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

@@ -0,0 +1,17 @@
+using Wino.Core.Domain.Enums;
+
+namespace Wino.Core.Domain.Models.Accounts;
+
+public sealed class InitialSynchronizationRangeOption
+{
+    public InitialSynchronizationRange Range { get; }
+    public string DisplayText { get; }
+
+    public bool IsEverything => Range == InitialSynchronizationRange.Everything;
+
+    public InitialSynchronizationRangeOption(InitialSynchronizationRange range, string displayText)
+    {
+        Range = range;
+        DisplayText = displayText;
+    }
+}