add tailwind class sorting on cn() (#249)

This change adds tailwind class sorting for classes used inline with the cn() function. It's an improvement, but a more complex regex is required for multiline cn() and cva() - those aren't sorted yet.

Author: andrecasal

.vscode/settings.json

@@ -3,5 +3,10 @@
     "@remix-run/server-runtime",
     "@remix-run/router",
     "react-router"
-  ]
+  ],
+  "tailwindCSS.experimental.classRegex": [
+		[
+			"cn\\(([^)]*)\\)"
+		]
+	]
 }