Add GitHub Profile Analyzer with Advanced Stats and Comparison

Implement a new "GitHub Profile Analyzer" dashboard in the ReactVerse project with the following functionalities:

- Search and analyze any GitHub user profile using the GitHub GraphQL API.
- Display profile details, repositories, stats, recent activity, and contribution calendar.
- Compare two GitHub profiles side-by-side.
- Modern, responsive UI with advanced charts and stats.
- Home page card for easy access.
- Documentation updates in [README.md](https://github.com/commitra/react-verse/blob/main/README.md) and [CONTRIBUTING.md](https://github.com/commitra/react-verse/blob/main/CONTRIBUTING.md).

I would like to raise a PR

先查看 README.md 和 CONTRIBUTING.md，然后检查现有的 ReactVerse 项目结构和页面模式，再为 analyzer 选择入口点。当 dashboard 支持个人资料搜索、详情、repositories、统计数据、活动、贡献日历、并排比较、响应式图表、主页卡片以及所要求的文档更新时，即视为完成。

由索引模型根据 Issue 内容生成。