feat: add uvScale to unlit material

materials/unlit.mat

@@ -13,6 +13,10 @@ material {
         { 
             type : int, 
             name : baseColorIndex 
+        },
+        { 
+            type : float2, 
+            name : uvScale
         }
     ],
     depthWrite : true,
@@ -21,7 +25,7 @@ material {
     blending: opaque,
     culling: none,
     instanced: false,
-    vertexDomain: object
+    vertexDomain: object,
 }
    
     fragment {