docs(ui): @base-ui/react is no longer a peer dependency

The UI Library overview told consumers to install @base-ui/react alongside the
package. It is now a regular dependency that installs automatically; react and
react-dom are the only peers.

Author: librowski-synergy

apps/docs/src/content/docs/ui-library/overview.mdx

@@ -15,12 +15,14 @@ page with a live example, props, and CSS variables.
 
 ## Install
 
-`@base-ui/react` is a peer dependency, so install it alongside the library:
-
 ```sh
-npm install @workflowbuilder/ui @base-ui/react
+npm install @workflowbuilder/ui
 ```
 
+`react` and `react-dom` are the only peer dependencies - provide your own.
+Everything else the components need, including `@base-ui/react` (pinned to the
+validated `1.4.x` line), is a regular dependency and installs automatically.
+
 ## Styles
 
 The library ships its CSS as separate entry points. Import the global stylesheet