feat: A templates change tool can use now.

[duncup]

Checklist

• [x] npm test passes
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [ ] commit message follows commit guidelines

Affected core subsystem(s)

Description of change

增加了一个用来把官方模版替换成此项目所需模版的脚本。

[duncup]

@thonatos 有空帮忙看看脚本有没有必要，随手写的。有点凌乱。

[duncup]

加了个 fs-plus 模块，简化了下。