Bunch of interaction updates for the calendar item control.

Wino.Calendar.ViewModels/Messages/CalendarItemTappedMessage.cs

@@ -0,0 +1,14 @@
+using Wino.Calendar.ViewModels.Data;
+
+namespace Wino.Calendar.ViewModels.Messages
+{
+    public class CalendarItemTappedMessage
+    {
+        public CalendarItemTappedMessage(CalendarItemViewModel calendarItemViewModel)
+        {
+            CalendarItemViewModel = calendarItemViewModel;
+        }
+
+        public CalendarItemViewModel CalendarItemViewModel { get; }
+    }
+}