SupporterCard Affix can now be changed.

Common/Data/Excel/SupportFixedExcel.cs

@@ -0,0 +1,18 @@
+using Newtonsoft.Json;
+
+namespace MikuSB.Data.Excel;
+
+[ResourceEntity("item/support/fixed.json")]
+public class SupportFixedExcel : ExcelResource
+{
+    [JsonProperty("ID")] public int Id { get; set; }
+    public int Num { get; set; }
+    public List<uint> Item { get; set; } = [];
+
+    public override uint GetId() => (uint)Id;
+
+    public override void Loaded()
+    {
+        GameData.SupportFixedData[Id] = this;
+    }
+}