Allow creating applications and libraries in separate folders for better project structure.

[ V ] Feature request

Currently both applications and libraries placed in same directory.
And there is only one config for this: `newProjectRoot`

Please add another one: `newLibraryRoot` - if set, libraries would be stored there.

首先定位 CLI 如何在其配置架构和项目生成入口中读取 `newProjectRoot`，然后检查现有的库创建测试。当配置了 `newLibraryRoot` 后，新生成的库会被放置在那里，同时现有应用程序的位置保持不变时，即表示完成。

由索引模型根据 Issue 内容生成。