feat(渲染注释): 渲染注释，可配置不渲染

ofdgo_res.go

@@ -97,6 +97,7 @@ type CompositeGraphicUnit struct {
 	CTM                  string                 `xml:"CTM,attr"`
 	DrawParam            string                 `xml:"DrawParam,attr"`
 	Alpha                *int                   `xml:"Alpha,attr"`
+	Visible              *bool                  `xml:"Visible,attr"`
 	Objects              []GraphicObject        `xml:"-"`
 	TextObject           []TextObject           `xml:"TextObject"`
 	PathObject           []PathObject           `xml:"PathObject"`