NBdev Jupyter Lab Extension

This is a feature idea/request.

**What**: Jupyter Lab NBDev extension

**Functionality**: Ability to do run common NBDEV functionality within Jupyter Lab without needing terminal. Having a menu on the left side where the file browser, and other extensions create their own panes would be great. Examples of functions include creating a new git repo project, Adding git hooks, Building Docs, building the library, cleaning notebooks, etc.

**Other Thoughts**: If it was designed with the git extension taken into consideration that would be great, since that already has notebook diffs which could be a good synergy.

该 payload 没有提及文件或测试；首先调研 nbdev 现有的命令以及 JupyterLab 扩展的集成点。根据列出的工作流定义初始范围，并评估 JupyterLab git 扩展将如何与这些工作流交互。当选定操作具备一致同意的设计和可工作的覆盖范围时，即可视为完成。

由索引模型根据 Issue 内容生成。