Update README with project status and modify banner link color

Author: feynon

README.md

@@ -1,5 +1,7 @@
 # Tiles Notebook
 
+> Update: Since the release of this alpha, work on the notebook has been paused. The notebook has been moved to [notebook.tiles.run](https://notebook.tiles.run) for the time being.
+
 Tiles is a notebook that makes working with AI agents easier. It's a multiplayer, offline-first experience built on MCP, featuring AI-generated widgets. Our vision is to make personal software ubiquitous in the future.
 
 ## Project Structure

packages/tiles-playground/components/Banner.tsx

@@ -17,7 +17,7 @@ export default function Banner() {
         href="https://ankeshbharti.com/stories/announcing-tiles-notebook-alpha"
         target="_blank"
         rel="noopener noreferrer"
-        style={{ color: '#F00', textDecoration: 'underline', fontWeight: 500 }}
+        style={{ color: '#027BFF', textDecoration: 'underline', fontWeight: 500 }}
       >
         Learn more
       </Link>