Update avatar_base implementation, assets and documentation

test_suites/contracts/tests/AvatarCatalogTests.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using Cthangover.Core.Mods.Testing;
+using Cthangover.Mods.Avatars;
+
+namespace Cthangover.Mods.Avatars.Contracts
+{
+    /// <summary>Exercises real Kind registration, mod entity resolution and independent catalog instances.</summary>
+    public sealed class AvatarCatalogTests
+    {
+        [ModTest("avatar_catalog/resolved_entity_creates_independent_instances")]
+        public static void Resource(ModTestContext ctx)
+        {
+            var first = AvatarCatalog.Create("avatar_contracts/sample");
+            var second = AvatarCatalog.Create("avatar_contracts/sample");
+            first.ApplyPresets(new Dictionary<string, string> { ["eyes_state"] = "closed" });
+            ModAssert.CloseTo(0, first.Resolve().Values["eye"].GetDouble());
+            ModAssert.CloseTo(1, second.Resolve().Values["eye"].GetDouble());
+            var restored = AvatarCatalog.Create("avatar_contracts/sample", first.CaptureState());
+            ModAssert.Equal("closed", restored.CaptureState().Presets["eyes_state"]);
+        }
+    }
+}