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

apps/web/content/documentation/authentication/configuration.mdoc

@@ -2,8 +2,7 @@
 title: "Configuration"
 description: "Learn how authentication works in MakerKit and how to configure it."
 publishedAt: 2024-04-11
-order: 0
-parent: "authentication/authentication"
+order: 1
 status: "published"
 ---
 

apps/web/content/documentation/getting-started/installing-dependencies.mdoc

@@ -2,7 +2,6 @@
 title: "Installing Dependencies"
 description: "Learn how to install dependencies for your project."
 publishedAt: 2024-04-11
-parent: "getting-started/getting-started"
 order: 0
 status: "published"
 ---