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/reference/settings/layout/readme.mdx

@@ -0,0 +1,85 @@
+---
+title: layout
+---
+
+The `layout` setting allows you to control the way pattern parts are
+laid out on the pattern. Either automatic, explicit, or not at all.
+
+## Signature
+
+```js
+const settings = {
+  Boolean|Object layout=true
+}
+```
+
+There are 3 scenarios:
+
+- layout is truthy: Do layout algorithmically
+- layout is falsy: Do not do any layout apart from stacking all parts together
+- layout is an object: Layout the parts as detailed in the layout object
+
+## example
+
+```js
+import { Aaron } from "@freesewing/aaron"
+
+const pattern = new aaron({
+  layout: false
+})
+```
+
+## Notes
+
+### Behavior when layout is truthy
+
+This is the default behaviour. Parts will be laid without overlap in
+a space that's a small as possible.
+
+Don't expect miracles here.
+It's one of those things humans are far better at than
+computers.
+
+### Behavior when layout is falsy
+
+This will cause all parts to be laid out on top of each other.
+
+It is almost certainly not what you want, but having all parts piled
+on top of each other in the top left corner can be a good starting
+point for a custom layout.
+
+### Behavior when layout is a layout object
+
+This allows you to control the layout by passing a layout object.
+This object should be structures as such:
+
+```js
+import { Aaron } from "@freesewing/aaron"
+
+const pattern = new Aaron({
+  layout: {
+    width: 600,
+    height: 1000,
+    stacks: {
+      front: {
+        move: {
+          x: 14,
+          y: -202
+        }
+      },
+      back: {
+        rotate: 90,
+        flipX: true,
+        flipY, true
+      }
+    }
+  }
+});
+```
+
+For each part in the `parts` attribute of our layout object, there are 4 possible attributes:
+
+- move: Expects an object with an `x` and `y` property, and will move the part by `x` along the X-axis and by `y` along the Y-axis
+- rotate: Expects a number, and will rotate the part by number degrees around its center point
+- flipX: Will flip/mirror the part horizontally
+- flipY: Will flip/mirror the part vertically