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/howtos/code/adding-points/en.md

@@ -0,0 +1,21 @@
+---
+title: Adding points
+for: developers
+about: Shows you how to add points to your pattern
+---
+
+After using the [shorthand](/howtos/core/shorthand/) call, 
+`Point` contains the point constructor, while `points` is a reference to `part.points`,
+which is where you should store your points.
+
+Things will now *just work* when you do this:
+
+```js
+points.centerBack  = new Point(0,0);
+```
+
+<Tip>
+
+The [Point API docs](/reference/api/point/) list many ways to create a point.
+
+</Tip>