feat(dev): Added react docs for Pattern + refactor

This adds support for not only documenating components, but also
constants and functions that may be exported next to components.

sites/dev/docs/reference/packages/react/components/breadcrumbs/readme.mdx

@@ -10,15 +10,18 @@ import { BreadcrumbsExample } from './_examples.js'
 
 <DocusaurusDoc>
 
+- [Components](#components)
+
+## Components
+
 The **Breadcrumbs** component family provides the following components:
 
 - [Breadcrumbs ](#breadcrumbs)
 
-## Breadcrumbs
+### Breadcrumbs
 
 <MiniNote>This component is different from the Docusaurus breadcrumbs</MiniNote>
 <br />
 <ComponentDocs docs={jsdocBreadcrumbs} example={BreadcrumbsExample} />
 
 </DocusaurusDoc>
-