Template for docs pages

Summary:
- Dynamic loading of documentation pages
- code highlighting for markdown files
- editing playground from sidebar

Reviewed By: emilsjolander

Differential Revision: D6964951

fbshipit-source-id: 1c7f36afa8d23215471d5b9a9c01bd2241c2008e

website/src/components/Playground/YogaEnumSelect.css

@@ -1,4 +1,4 @@
-.YogaEnumSelect.ant-radio-group {
+.YogaEnumSelect {
   display: flex;
 }
 
@@ -7,3 +7,8 @@
   flex-basis: 0;
   text-align: center;
 }
+
+.YogaEnumSelect .ant-btn {
+  flex-grow: 1;
+  flex-basis: 0;
+}