Add table of contents to Overview page (#108)

Co-authored-by: Claude Opus 4.5 <[email protected]>

Author: kcmartin

src/content/docs/index.mdx

@@ -1,7 +1,6 @@
 ---
 title: Sprites Overview
 description: Persistent, hardware-isolated execution environments for arbitrary code
-tableOfContents: false
 ---
 
 import { LinkCard, CardGrid } from '@/components/react';
@@ -59,7 +58,7 @@ Sprites automatically hibernate after a period of inactivity (30 seconds by defa
 
 Every Sprite gets a unique URL, making it easy to expose web services or APIs running inside, without a lot of extra setup.
 
-## Get Started
+## Next Steps
 
 <CardGrid client:load>
   <LinkCard