Initial feature for drag / drop calendar events.

Wino.Core/Requests/Calendar/ChangeStartAndEndDateRequest.cs

@@ -0,0 +1,15 @@
+using System.Collections.Generic;
+using Wino.Core.Domain.Entities.Calendar;
+using Wino.Core.Domain.Enums;
+
+namespace Wino.Core.Requests.Calendar;
+
+/// <summary>
+/// Request to move an existing calendar event by changing its start and end dates.
+/// The item should already be updated in the local database before this request is queued.
+/// </summary>
+public record ChangeStartAndEndDateRequest(CalendarItem Item, List<CalendarEventAttendee> Attendees)
+    : UpdateCalendarEventRequest(Item, Attendees)
+{
+    public override CalendarSynchronizerOperation Operation => CalendarSynchronizerOperation.ChangeStartAndEndDate;
+}