Add Synty asset packs (enemies + environment/FX/UI) via Git LFS

14 newly-imported Synty Polygon packs (~2.46 GB; FBX/PNG/textures stored in
Git LFS per .gitattributes). Enemy-grade characters: Werewolf, Kaiju,
FantasyHeroCharacters, Vikings, Western, HorrorCarnival, Dog. Environment:
Nature, NatureBiomes, PNB_Core, FantasyKingdom. UI/icons: Icons,
InterfaceCore, InterfaceSciFiSoldierHUD.

Werewolf + Kaiju back the DR-023 animated enemies; the rest are cataloged
for future work in Docs/Vault/06_Roadmap/Synty_Asset_Inventory.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Synty/InterfaceCore/Scripts/UnityUIExtensions/ShaderLibrary.cs

@@ -0,0 +1,28 @@
+/// Credit SimonDarksideJ
+/// Updated by Synty: Renamed Unity.UI.Extensions to Synty.Interface.Extensions to avoid conflicts with Unity Ui Extensions and to pass Unity asset store submission.
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Synty.Interface.Extensions
+{
+    public static class ShaderLibrary
+    {
+        public static Dictionary<string, Shader> shaderInstances = new Dictionary<string, Shader>();
+        public static Shader[] preLoadedShaders;
+
+        public static Shader GetShaderInstance(string shaderName)
+        {
+            if (shaderInstances.ContainsKey(shaderName))
+            {
+                return shaderInstances[shaderName];
+            }
+
+            var newInstance = Shader.Find(shaderName);
+            if (newInstance != null)
+            {
+                shaderInstances.Add(shaderName, newInstance);
+            }
+            return newInstance;
+        }
+    }
+}