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

website/docs/styling/display.mdx

@@ -0,0 +1,25 @@
+---
+sidebar_position: 4
+---
+
+import Playground from '@site/src/components/Playground';
+
+# Display
+
+Display controls which layout specification to follow.
+
+**Flex (default)**: The CSS Flexible Box Model specification.
+
+**None**: The node is removed from the layout tree and will not be visible.
+
+<Playground code={`<Layout config={{useWebDefaults: false}}>
+  <Node
+    style={{
+      width: 200,
+      height: 200,
+      padding: 10,
+    }}>
+    <Node style={{margin: 5, height: 50, display: 'none'}} />
+    <Node style={{margin: 5, height: 50, display: 'flex'}} />
+  </Node>
+</Layout>`} />