feat(react): add nextjs locale loaders

Author: maxprilutskiy

packages/react/src/next/index.ts

@@ -0,0 +1 @@
+export * from './loaders';

packages/react/src/next/loaders.ts

@@ -0,0 +1,8 @@
+'use server';
+
+import { cookies } from 'next/headers';
+
+export async function loadLocaleFromCookie() {
+  const cookieMgr = cookies();
+  return cookieMgr.get('locale')?.value || 'en';
+}