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/types/src/cms-client.ts

@@ -3,6 +3,7 @@ export namespace Cms {
   export interface ContentItem {
     id: string;
     title: string;
+    label: string | undefined;
     url: string;
     description: string | undefined;
     content: unknown;