Add note to readme

Author: jonrohan

README.md

@@ -26,7 +26,9 @@
 
 ## Documentation
 
-> :warning: **The documentation of this repo is not maintained anymore**. Please raise any documentation-specific pull requests in [primer.style/design](https://github.com/primer/design/) 
+> :warning: It is encouraged that you use [primer/react](https://github.com/primer/react) and [primer/view_components](https://github.com/primer/view_components) for styling and markup.
+
+> :warning: **The documentation of this repo is not maintained anymore**. Please raise any documentation-specific pull requests in [primer.style/design](https://github.com/primer/design/)
 
 Our documentation site lives at [primer.style/css](https://primer.style/css). You'll be able to find detailed documentation on getting started, all of the components, our theme, our principles, and more.