Refactor shader property system to support runtime reflection via ShaderPropertyType and ShaderPropertyFieldInfo. Introduce strongly-typed Texture2D/3D and Buffer handle structs. Update ShaderPropertiesGenerator to emit field metadata and register it. Move mesh content structs to AssetManager.Mesh.cs and mark as internal. Update DSLShaderCompiler and registry for new property API. Remove obsolete files and clean up namespaces. Add sample TestShaderProperty struct.
Misaki
ba8694ed0c