Yoga Docs: Rename website-next to website (#1613)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1613

So that GitHub links to edit a page point to the right place.

This will fail in OSS build until I switch the directory used by Vercel instance, but I am waiting to do that until ready to land, since that would cause other in progress changes to fail when exported.

Reviewed By: joevilches

Differential Revision: D54837857

fbshipit-source-id: 9bec90232dbe3ec8638568685671185d597fcf2d

website/docs/styling/aspect-ratio.mdx

@@ -0,0 +1,27 @@
+---
+sidebar_position: 3
+---
+
+import Playground from '@site/src/components/Playground';
+
+# Aspect Ratio
+
+The aspect ratio property in Yoga has the following properties:
+
+- Accepts any floating point value > 0, the default is undefined.
+- Defined as the ratio between the [width](/docs/styling/width-height) and the [height](/docs/styling/width-height) of a node e.g. if a node has an aspect ratio of 2 then its [width](/docs/styling/width-height) is twice the size of its [height](/docs/styling/width-height).
+- Respects the [min](/docs/styling/min-max-width-height) and [max](/docs/styling/min-max-width-height) dimensions of an item.
+- Has higher priority than [flex grow](/docs/styling/flex-basis-grow-shrink)
+- If aspect ratio, [width](/docs/styling/width-height), and [height](/docs/styling/width-height) are set then the cross axis dimension is overridden.
+
+<Playground code={`<Layout config={{useWebDefaults: false}}>
+  <Node
+    style={{
+      width: 200,
+      height: 200,
+      padding: 10,
+    }}>
+    <Node style={{margin: 5, height: 50, aspectRatio: 1.0}} />
+    <Node style={{margin: 5, height: 50, aspectRatio: 1.5}} />
+  </Node>
+</Layout>`} />