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/position.mdx

@@ -0,0 +1,37 @@
+---
+sidebar_position: 11
+---
+
+import Playground from '@site/src/components/Playground';
+
+# Position
+
+**Relative (default)**: This node is laid out according to the specified flow of the flex container it is apart of.
+That is, it particpates in the flexbox algorithm and will take up space within the container, unlike absolute.
+[Insets](/docs/styling/insets) will offset the node from its normal position within its container.
+This node will always form a [containing block](/docs/advanced/containing-block).
+
+**Absolute**: This node is removed from the specified flow of the flex container it is apart of.
+Absolute nodes do not take up space in its flex container and will not affect the position of
+its siblings. [Insets](/docs/styling/insets) will offset the node from its [containing block](/docs/advanced/containing-block).
+
+**Static**: This node behaves like relative except it will ignore [insets](/docs/styling/insets) and will not
+form a [containing block](/docs/advanced/containing-block).
+
+<Playground code={`<Layout config={{useWebDefaults: false}}>
+  <Node
+    style={{
+      width: 200,
+      height: 200,
+      padding: 10,
+    }}>
+    <Node
+      style={{
+        margin: 5,
+        height: 50,
+        top: 20,
+        position: 'relative',
+      }}
+    />
+  </Node>
+</Layout>`} />