feat(emblem): /emblem/emblem_list returns owned ids

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Emblem/EmblemListEntry.cs

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+using MessagePack;
+using System.Text.Json.Serialization;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Emblem;
+
+[MessagePackObject]
+public class EmblemListEntry
+{
+    [JsonPropertyName("emblem_id")]
+    [Key("emblem_id")]
+    public int EmblemId { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Emblem/EmblemListResponse.cs

@@ -0,0 +1,12 @@
+using MessagePack;
+using System.Text.Json.Serialization;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Emblem;
+
+[MessagePackObject]
+public class EmblemListResponse
+{
+    [JsonPropertyName("user_emblem_list")]
+    [Key("user_emblem_list")]
+    public List<EmblemListEntry> UserEmblemList { get; set; } = new();
+}