support embedding scene data to PNG/SVG (#2219)

Co-authored-by: Lipis <lipiridis@gmail.com>

src/appState.ts

@@ -25,6 +25,7 @@ export const getDefaultAppState = (): Omit<
     elementType: "selection",
     elementLocked: false,
     exportBackground: true,
+    exportEmbedScene: false,
     shouldAddWatermark: false,
     currentItemStrokeColor: oc.black,
     currentItemBackgroundColor: "transparent",
@@ -112,6 +113,7 @@ const APP_STATE_STORAGE_CONF = (<
   elementType: { browser: true, export: false },
   errorMessage: { browser: false, export: false },
   exportBackground: { browser: true, export: false },
+  exportEmbedScene: { browser: true, export: false },
   gridSize: { browser: true, export: true },
   height: { browser: false, export: false },
   isBindingEnabled: { browser: false, export: false },