feat: Flat import of markdown repo

This is a flat (without history) import of (some of) the content
from our markdown module.

We've imported this without history because the repo contains our
blog posts and showcases posts content prior to porting them to strapi.

Since this contains many images, it would balloon the size of this repo
to import the full history.

Instead, please refer to the history of the (archived) markdown repo
at: https://github.com/freesewing/markdown

markdown/dev/reference/api/path/split/en.md

@@ -0,0 +1,43 @@
+---
+title: split
+---
+ 
+```js
+array path.split(Point splitPoint)
+```
+
+Splits a path in two halves, on a point along that path that you pass it.
+
+<Example 
+  part="path_split" 
+  caption="Example of the Path.split() method" 
+/>
+
+```js
+let { Point, points, Path, paths, Snippet, snippets } = part.shorthand();
+
+points.A = new Point(45, 60);
+points.B = new Point(10, 30);
+points.BCp2 = new Point(40, 20);
+points.C = new Point(90, 30);
+points.CCp1 = new Point(50, -30);
+points.D = new Point(50, 130);
+points.DCp1 = new Point(150, 30);
+
+paths.demo = new Path()
+  .move(points.D)
+  .curve(points.DCp1, points.DCp1, points.C)
+  .curve(points.CCp1, points.BCp2, points.B)
+  .line(points.A);
+
+points.split = paths.demo.shiftFractionAlong(0.75);
+snippets.split = new Snippet("notch", points.split);
+
+let style = "stroke-width: 3; stroke-opacity: 0.5;";
+let halves = paths.demo.split(points.split);
+for (let i in halves) {
+  paths[i] = halves[i]
+    .attr("style", style)
+    .attr("style", `stroke: hsl(${i * 70}, 100%, 50%)`);
+}
+```