feat: Python3 Sandbox

[dogfar]

提供了一个Python 3运行沙盒环境，能够在代码节点运行Python 3代码。效果如下：

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[c121914yu]

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📦 Preview Image: ghcr.io/labring/fastgpt-pr:3530b374a1beeed433e3981db6ffe32c956e2fdc

[c121914yu]

感谢你的提交，有几个安全问题需要检查：

1. 网络请求（需要禁止
2. cpu/内存 限制
3. 超时强制终止
4. 全局变量/环境变量泄露问题（沙盒里拿到主线程全局数据
5. 避免破坏主线程（比如可以 exit 退出主线程）
6. 禁止磁盘读写

另外，看起来是装了 py 的环境，是否可以直接和现在的 sandbox 镜像合并。

[gru-agent[bot]]

❌ Rebase test pr failed: Error: Pull request labring/FastGPT#3944 is not created by gru-agent[bot]