chore(markdown): Restructuring dev docs

markdown/dev/reference/api/macros/cutonfold/en.md

@@ -0,0 +1,35 @@
+---
+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 |
+
+<Note>
+
+###### It's safe to use a corner of your pattern part for this
+
+Since this is typically used on corners, the generated cut-on-fold indicator 
+will not go all the way to the `to` and `from` points.
+
+</Note>
+
+