完善官网思维导图 demo

[GaoFuhong]

功能描述

完善官网思维导图 demo：https://x6.antv.antgroup.com/examples/layout/tree/#mindmap ，支持节点分支的添加和删除，支持节点内容编辑

期望解决方案

参考：https://reactflow.dev/examples/layout/dynamic-layouting

[github-actions]

🧑🏻‍💻 In order to ensure the better, healthy, and sustainable development of our open-source project, and to allow develops in the community who are interested in open source to easily get started and contribute, we have included this issue in the oscp program. You can claim it by replying with "claim." During the process, you will receive one-on-one guidance from project members, and after your contribution is merged, you will be eligible for some official activity incentives.

Reference document:

• Creating a Pull Request

---

🧑🏻‍💻 为了让我们的开源项目能更好的、健康的可持续发展，也让社区对开源感兴趣的同学，能轻轻松松的入门和贡献，我们将这个 issue 纳入到 oscp 计划中，回复「认领」即可认领，过程中能有项目成员的一对一指导，并在合并之后获得官方的一些活动激励。

参考文档：

• 创建一个 Pull Request