Jupyter code cell folding feature request

Feature: Notebook Editor, Interactive Window, Python Editor cells

Description

When you have a python file with jupyter code cells (using # %%), it would be nice if I could fold individual cells, like I can fold functions.

Microsoft Data Science for VS Code Engineering Team: @rchiodo, @IanMatthewHuff, @DavidKutu, @DonJayamanne, @greazer

[Huud]

This is the main reason stopping me from using VSCode more instead of the standard JupyterNB with Nbextensions, I work with a lot of cells that many become set in stone and not needed to be changed, not being able to fold/hide them increases the clutter immensely, it becomes harder to work.

[DonJayamanne]

Note: This is a simple enough change. We have the cell ranges. All we need to do is create a class that provides the collapsible ranges to VSC. Return the cell ranges and things should work as expected.

@jordan-schneider thanks for the suggestion.