Require ganon item setting

ALttPRandomizer/Model/SeedSettings.cs

@@ -51,6 +51,10 @@
         [IgnoreSetting(Apr2025)]
         public GanonItem GanonItem { get; set; } = GanonItem.Silver;
 
+        [NoSettingName]
+        [IgnoreSetting(Apr2025)]
+        public RequireGanonItem RequireGanonItem { get; set; } = RequireGanonItem.SilverlessAllowed;
+
         [SettingName("shuffle")]
         [ForbiddenSetting([Apr2025], EntranceShuffle.Swapped)]
         public EntranceShuffle EntranceShuffle { get; set; } = EntranceShuffle.Vanilla;
@@ -327,6 +331,11 @@
         None,
     }
 
+    public enum RequireGanonItem {
+        SilverlessAllowed,
+        [AdditionalSetting("--require_ganon_item")] SpecialItemRequired,
+    }
+
     public enum EntranceShuffle {
         Vanilla,
         Full,