Add links to home page

Author: djhi

docs_headless/src/content/docs/index.mdx

@@ -7,8 +7,11 @@ hero:
   image:
     file: ../../assets/houston.webp
   actions:
-    - text: Guides & concepts
-      link: /mui/guides/architecture/
+    - text: Headless
+      link: /headless/guides/architecture/
+      icon: right-arrow
+    - text: Shadcn UI
+      link: /shadcn/guides/architecture/
       icon: right-arrow
 ---