feat: add className support to language swithcer

Author: maxprilutskiy

.changeset/silver-crabs-cheat.md

@@ -0,0 +1,5 @@
+---
+"@lingo.dev/_react": minor
+---
+
+add className support to language switcher component

packages/react/src/client/locale-switcher.tsx

@@ -4,6 +4,7 @@ import { useState, useEffect } from "react";
 import { getLocaleFromCookies, setLocaleInCookies } from "./utils";
 
 export type LocaleSwitcherProps = {
+  className?: string;
   locales: string[];
 };
 
@@ -23,6 +24,7 @@ export function LocaleSwitcher(props: LocaleSwitcherProps) {
   return (
     <select
       value={locale}
+      className={props.className}
       onChange={(e) => {
         handleLocaleChange(e.target.value);
       }}