This is a simple plugin to allow editing ipynb (Jupyter) notebook cells
directly. Right now it requires the cell to consist of only one item with
"text" key and the value on a single line. Then pressing <CR> (enter) on
that line opens a new split that you can edit. Pressing enter in that split
applies your changes to the notebook directly.
It also sets formatprg to jq which you can use with gq, along with proper
syntax and indent configuration for json.