feat: scaffold MUI theme, providers, color mode and i18n

src/app/providers.tsx

@@ -0,0 +1,12 @@
+'use client';
+
+import { I18nProvider } from '../services/i18n';
+import { ColorModeProvider } from '../services/color-mode';
+
+export default function Providers({ children }: { children: React.ReactNode }) {
+  return (
+    <I18nProvider>
+      <ColorModeProvider>{children}</ColorModeProvider>
+    </I18nProvider>
+  );
+}