Add installation note for react-debug plugin

Author: Rel1cx

apps/website/content/docs/rules/overview.mdx

@@ -144,7 +144,9 @@ full: true
 
 ## Debug Rules
 
-<Callout type="info">
+<Callout type="warning">
+  The `eslint-plugin-react-debug` package is not included in the unified plugin. You need to install and configure it separately.
+
   These rules are useful for code metrics, code transformation, issue reporting, or when building custom tooling that needs to identify specific React patterns.
 </Callout>