Fix suppot for mui (#5016)

.changeset/friendly-bottles-push.md

@@ -0,0 +1,7 @@
+---
+'@astrojs/react': minor
+---
+
+Add support for mui
+
+This adds support for [mui](https://mui.com/) through configuration. Users will now not need to configure this library to get it to work.

packages/integrations/react/src/index.ts

@@ -61,6 +61,10 @@ function getViteConfiguration() {
 			external: ReactVersion.startsWith('18.')
 				? ['react-dom/server', 'react-dom/client']
 				: ['react-dom/server.js', 'react-dom/client.js'],
+			noExternal: [
+				// These are all needed to get mui to work.
+				'@mui/material', '@mui/base', '@babel/runtime'
+			]
 		},
 	};
 }