Jupyter notebook should offer mechanism to generate trace file for the PDL Trace Explorer

[esnible]

Is your feature request related to a problem? Please describe.
I would like to inspect PDL traces of PDL programs I executed from inside a Jupyter notebook.

Describe the solution you'd like
I'm not sure.

• Should it always trace to a well-known file such as /tmp/pdl-jupyter.trace.log?
• Should the call magic allow something like %%pdl --reset-context --trace /tmp/from-jupyter.trace.json?
• Should the Jupyter extension put some kid of hyperlink to the Trace Explorer in every cell?