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/macros/cutonfold/en.md

@@ -0,0 +1,27 @@
+---
+title: cutonfold
+---
+
+The `cutonfold` macro adds a *cut on fold* indicator to your pattern.  
+It is provided by the [cutonfold plugin](/reference/plugins/cutonfold).
+
+<Example part="plugin_cutonfold" caption="Example of the cut on fold indicator added by this macro" />
+
+```js
+macro('cutonfold', {
+  from: points.cofLeft,
+  to: points.cofRight,
+  grainline: true
+}
+```
+
+| Property    | Default | Type                | Description | 
+|------------:|---------|---------------------|-------------|
+| `from`      |         | [Point](/reference/api/point) | The startpoint of the *cut on fold* indicator |
+| `to`        |         | [Point](/reference/api/point) | The endpoint of the *cut on fold* indicator |
+| `margin`    | 5       | [Point](/reference/api/point) | The distance in % to keep from the start/end edge |
+| `offset`    | 50      | Number              | The distance in mm to offset from the line from start to end |
+| `grainline` | `false` | Boolean             | Whether this cutonfold indicator is also the grainline |
+
+
+