Add maintenance warning and redirect to registry components

Added a warning about the repository's maintenance status and recommended using registry components.

Author: AVGVSTVS96

README.md

@@ -1,3 +1,7 @@
+> [!WARNING]
+> This repo is not actively maintained, these are legacy components and are not up to date. Use our [registry components](https://github.com/assistant-ui/assistant-ui/tree/main/apps/registry/components/assistant-ui) instead.
+
+
 # @assistant-ui/react-ui
 
 Pre-styled React components for [@assistant-ui/react](https://github.com/assistant-ui/assistant-ui).
@@ -104,4 +108,4 @@ function MyChat() {
 
 ## License
 
-MIT
+MIT