- Modified DNAClassAttribute to also support usage on structs

- Added auto generation of DNAClass attributes on file generation
- Regenerated all files

BlendFile/DNA/SceneGpencil.cs

@@ -13,6 +13,7 @@ using System;
 namespace BlendFile.DNA {
     using BlendFile;
     
+    [DNAClassAttribute(836, "SceneGpencil")]
     public struct SceneGpencil {
         [DNAFieldAttribute(0, "float", "smaa_threshold", 4)]
         public float smaa_threshold;