construction: Adding source files to NPM package

packages/examples/.npmignore

@@ -1,2 +1 @@
-src
 .editorconfig

packages/examples/src/point_attr.js

@@ -2,11 +2,10 @@ import { box } from "./shared";
 
 export default part => {
   let { Point, points, Snippet, snippets } = part.shorthand();
-
-  box(part);
+  box(part); // Needed for demo as this part has no paths
 
   points.anchor = new Point(50, 25)
-    .attr("data-text", "Hello world!\nThis is\na line break.")
+    .attr("data-text", "msg")
     .attr("data-text-class", "text-xl center")
     .attr("data-text-lineheight", 10);