Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

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

@@ -0,0 +1,14 @@
+namespace Wino.Core.Domain.Models.Calendar
+{
+    public class CalendarRenderOptions
+    {
+        public CalendarRenderOptions(DateRange dateRange, CalendarSettings calendarSettings)
+        {
+            DateRange = dateRange;
+            CalendarSettings = calendarSettings;
+        }
+        public int TotalDayCount => DateRange.TotalDays;
+        public DateRange DateRange { get; }
+        public CalendarSettings CalendarSettings { get; }
+    }
+}