refactor: Use canvas.drawImageNine in NineTileBox (#1314)

`canvas.drawImageNine` is built-in now a lot of logic was removed from NineTileBox.

examples/lib/stories/widgets/nine_tile_box_example.dart

@@ -6,9 +6,9 @@ Widget nineTileBoxBuilder(DashbookContext ctx) {
   return Container(
     width: ctx.numberProperty('width', 200),
     height: ctx.numberProperty('height', 200),
-    child: NineTileBox.asset(
+    child: NineTileBoxWidget.asset(
       path: 'nine-box.png',
-      tileSize: 8,
+      tileSize: 22,
       destTileSize: 50,
       child: const Center(
         child: Text(