Add Next.js project with internationalization support

- Set up Next.js 15 with TypeScript, ESLint, and Tailwind CSS
- Add i18n support for Korean, English, and Japanese
- Implement language switcher and navigation components
- Update .gitignore to exclude node_modules, IDE files, and build artifacts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -1,2 +0,0 @@
-# sam-react-prod
-