Added PBR2 material and option to load using glTF

Author: Mike Bond

packages/dev/core/src/Materials/PBR/index.ts

@@ -5,6 +5,7 @@ export * from "./pbrBRDFConfiguration";
 export * from "./pbrClearCoatConfiguration";
 export * from "./pbrIridescenceConfiguration";
 export * from "./pbrMaterial";
+export * from "./pbrMaterial2";
 export * from "./pbrMetallicRoughnessMaterial";
 export * from "./pbrSpecularGlossinessMaterial";
 export * from "./pbrSheenConfiguration";
@@ -15,3 +16,7 @@ export * from "../../ShadersWGSL/pbr.vertex";
 export * from "../../ShadersWGSL/pbr.fragment";
 export * from "../../Shaders/pbr.vertex";
 export * from "../../Shaders/pbr.fragment";
+export * from "../../ShadersWGSL/pbr2.vertex";
+export * from "../../ShadersWGSL/pbr2.fragment";
+export * from "../../Shaders/pbr2.vertex";
+export * from "../../Shaders/pbr2.fragment";