Perhaps add clarification on the distinction between "python -m pip install -e ." and "jupyter labextension develop . --overwrite"

It might be constructive to explain the distinction in the effects of `pip install -e .` and `jupyter labextension develop . --overwrite`.

```
# install the extension in editable mode
python -m pip install -e .

# install your development version of the extension with JupyterLab
jupyter labextension develop . --overwrite
```

Start by locating the development documentation that contains the two commands shown in the issue. Explain how `python -m pip install -e .` differs from `jupyter labextension develop . --overwrite`, and consider the documentation complete when a reader can tell the effect and purpose of each command.

Written by the indexing model from the issue text.