Documentation Updates (#79)

* Docs: Added Shadcn sidebar; added algorithm to automatically infer parents without needing to specify it.
* Extracted Markdoc compilation in a separate file
* Site Navigation: simplify nav by removing the border
* Docs Navigation: added TOC; improved layout on mobile

packages/cms/keystatic/src/content-renderer.tsx

@@ -1,3 +1,3 @@
 export function KeystaticContentRenderer(props: { content: unknown }) {
-  return <div>{props.content as React.ReactNode}</div>;
+  return props.content as React.ReactNode;
 }