DTOs for index mostly done, doing DB models

SVSim.EmulatedEntrypoint/Models/Dtos/DefaultSettings.cs

@@ -0,0 +1,14 @@
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos;
+
+[MessagePackObject]
+public class DefaultSettings
+{
+    [Key("default_emblem_id")]
+    public ulong DefaultEmblemId { get; set; }
+    [Key("default_degree_id")]
+    public int DefaultDegreeId { get; set; }
+    [Key("default_mypage_id")]
+    public ulong DefaultMyPageBackground { get; set; }
+}