Store outcome of test runs per port / board in the cell metadata

[Josverl]

%mpy --info --store
can store all CPU info in the notebook metadata

cell magic %% micropython --store

• test outcomes ( OK / Failure or full details could then be stored per cell

• This makes testing the same code , and collecting the information across different ports / version much simpler

• how to store the data - reliably - no formal APIs ?
  https://github.com/christianp/jupyter-interactions-site/blob/master/get_metadata.py

• Need a way to report

• need a way to specify the distinguishing factor ( port / version / board et )

• how to clear the stored metadata