Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Core.Domain/Models/Calendar/CalendarViewDayClickedEventArgs.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace Wino.Core.Domain.Models.Calendar
+{
+    /// <summary>
+    /// Contains the clicked date on the calendar view.
+    /// </summary>
+    /// <param name="ClickedDate">Requested date.</param>
+    public record CalendarViewDayClickedEventArgs(DateTime ClickedDate);
+}