Support for partial execution

🚀 Feature

I do not know of this is already possible somehow.

Is it possible to launch papermill in a way that I can execute a notebook,

• up to a specified cell
• setting a range using cell numbers
• setting a range using Markdown headers

Motivation

I have some notebooks that, even if relatively short, perform operations that might benefit to be split such as defining a list of files to download and actually try to download them. I am trying to avoid having to split the notebooks further.