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.

sites/dev/docs/tutorials/pattern-design/part2/readme.mdx

@@ -0,0 +1,47 @@
+---
+title: "Part 2: Parametric design"
+---
+
+Welcome to part 2 of this FreeSewing pattern design tutorial.
+In this part I will show you how to design a bespoke
+sewing pattern, start to finish.
+
+:::tip
+##### Before you start
+
+This tutorial assumes you are familiar with the following:
+
+- Scalable Vector Graphics
+- The coordinate system
+- Units in FreeSewing
+- Cubic Bézier curves
+
+Which is a lot to assume. So if you'd like you can take a quick detour
+via our [Before you start guide](/guides/prerequisites). \
+It's very short, but covers some basic
+terminology and concepts that we'll use throughout this guide.
+:::
+
+## Pick a template
+
+The FreeSewing development environment ships with several templates you
+can start from. I recommend you start **From scratch** as you'll learn the most
+that way. But you can also start from the **Tutorial** template in which case
+you will already have the end result we are aiming for today:
+
+<div class="grid grid-cols-2 gap-2">
+
+!['From scratch' template](./fromscratch.png)
+
+!['Tutorial' template](./tutorial.png)
+
+</div>
+
+Depending on the choice you made, you will need to edit files in a different folder.
+
+- Edit files in `design/from-scratch` if you are using the **From scratch** template
+- Edit files in `design/tutorial` if you are using the **Tutorial** template
+
+You can choose either, or even switch back and forth between both.
+
+To follow along step-by-step with the tutorial, go to the `design/from-scratch` folder.