Update babel config

Summary:
allow-large-files

During decapitation the style guide was accidentally removed. In this diff we bring it back and embed it into our docs.
The only caveat is that the fonts have slightly changes because we included antd.css. It does not change too much from my point of view, but I would love to hear from the team.

Reviewed By: jknoxville

Differential Revision: D34339758

fbshipit-source-id: 10d347bc805f9314ae717de483bf8b766000280f

website/babel.config.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+module.exports = {
+  presets: [require.resolve('@docusaurus/core/lib/babel/preset')],
+};