Implemented a new dialog for account re-ordering and required apis.

Wino.Core/Messages/Accounts/AccountMenuItemsReordered.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+
+namespace Wino.Core.Messages.Accounts
+{
+    /// <summary>
+    /// Emitted when account menu items are reordered.
+    /// </summary>
+    /// <param name="newOrderDictionary">New order info.</param>
+    public record AccountMenuItemsReordered(Dictionary<Guid, int> newOrderDictionary);
+}