sparkles: Added snippet.attr and snippet.clone examples

packages/examples/src/snippet_attr.js

@@ -0,0 +1,12 @@
+import { box } from "./shared";
+
+export default part => {
+  let { Point, points, Snippet, snippets } = part.shorthand();
+
+  points.anchor = new Point(50, 15);
+  snippets.demo = new Snippet("logo", points.anchor)
+    .attr("data-scale", 0.8)
+    .attr("data-rotate", 180);
+
+  return box(part);
+};