add: registry pass through

src/Attributes/RegistryPassThrough.cs

@@ -0,0 +1,6 @@
+namespace Polonium.Attributes;
+[AttributeUsage(AttributeTargets.Property)]
+public class RegistryPassThrough(bool getterOnly = false) : Attribute
+{
+    public bool GetterOnly { get; set; } = getterOnly;
+}

src/PoloniumRegistry.cs

@@ -1,5 +1,6 @@
 using Godot;
 using Polonium.Agents;
+using Polonium.Attributes;
 using Polonium.Interfaces;
 using Polonium.Resources;
 
@@ -9,16 +10,22 @@ public class PoloniumRegistry
 {
     private static PoloniumRegistry InternalInstance { get; set; }
     public static PoloniumRegistry Instance => InternalInstance ??= new PoloniumRegistry();
+    [RegistryPassThrough]
     public Config Config { get; set; }
+    [RegistryPassThrough]
     public Save Save { get; set; }
 
     public static void Prepare()
     {
         DirAccess.MakeDirAbsolute("user://saves");
     }
-    public Dictionary<string, Agent> Agents { get; set; } = new();
+    // ReSharper disable once CollectionNeverQueried.Global
+    [RegistryPassThrough(true)]
+    public Dictionary<string, Agent> Agents { get; } = new();
     
-    public HashSet<ITimeConsumer> TimeConsumers { get; set; } = new();
+    // ReSharper disable once CollectionNeverQueried.Global
+    [RegistryPassThrough(true)]
+    public HashSet<ITimeConsumer> TimeConsumers { get; } = new();
     
 
 }