chore: Port FreeSewing.dev to docusaurus

The replaces the NextJS site powering FreeSewing.dev with a Docusaurus
setup. It's part of my efforts to simplify FreeSewing's setup so we can
focus on our core value proposition.

markdown/dev/howtos/code/adding-snippets/en.md

@@ -1,51 +0,0 @@
----
-title: Adding snippets
----
-
-Snippets should be stored in the `snippets` key of the object passed to your part's
-draft method. The constructor for snippets is available in the `Snippets` key. You can
-destructure them for easy access.
-
-<Example caption="An example of adding a snippet" tutorial>
-```design/src/part.mjs
-function draftPart = ({ 
-  Point,
-  Path,
-  paths,
-  // highlight-start
-  Snippet, 
-  snippets,
-  // highlight-end
-  part 
-}) {
-
-  // highlight-start
-  snippets.logo = new Snippet('logo', new Point(50,50))
-    .attr('data-scale', 0.5)
-    .attr('data-rotate', 180)
-  // highlight-end
-
-  // prevent clipping
-  paths.demo = new Path()
-    .move(new Point(0,0))
-    .move(new Point(100,100))
-
-  return part
-}
-```
-</Example>
-
-You can scale and rotate a snippet by setting the `data-scale` and `data-rotate` attributes respectively.
-
-- **data-scale** : Either a single scale factor, or a set of 2 scale factors
-  for the X and Y axis respectively. See [the SVG scale
-  transform](https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/transform#Scale)
-  for details.
-- **data-rotate**: A rotation in degrees. The center of the rotation will be
-  the snippet's anchor point
-
-<Tip>
-
-See [Using attributes](/howtos/code/attributes/) for details on how to set attributes.
-
-</Tip>