Option to keep notebook open after run for debugging

To my understanding of Papermill, there is currently no option to keep the notebook running / keep the kernel alive and to interact with it.

When a notebook fails, it would be a good time saver to have access to the running notebook to debug using %pdb or to print variables

I barely know Papermill's codebase (and barely know nbclient as well) so it's hard for me to estimate whether it's possible and the work required, but if someone who knows the codebase can give me pointers I could help with the feature 👍