feat(i18n): add i18n types, config, provider, context, and custom hook

src/main.tsx

@@ -2,9 +2,12 @@ import { StrictMode } from 'react';
 import { createRoot } from 'react-dom/client';
 import './index.css';
 import App from './App';
+import { LanguageProvider } from './providers/LanguageProvider';
 
 createRoot(document.getElementById('root')!).render(
   <StrictMode>
-    <App />
+    <LanguageProvider>
+      <App />
+    </LanguageProvider>
   </StrictMode>,
 );