feat(scene): integrate standard DWG data

src/scene/model/mod.rs

@@ -3,8 +3,10 @@ pub mod gdi;
 pub mod hatch_model;
 pub mod hatch_patterns;
 pub mod image_model;
+pub mod material_model;
 pub mod ole_pres;
 pub mod pdf_raster;
 pub mod mesh_model;
 pub mod solid_model;
+pub mod visual_style_model;
 pub mod object;