Improve integration between debugging and Positron comms

[seeM]

Currently, when at a debugger breakpoint in a Python file, none of the Positron comm-based UI components are functional.

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I have a Python script and simply cannot figure out how to make variables appear in Data Explorer when debugging (as one can with RStudio). I can only see them in the Debug Variables window, which is not sufficient for my needs. Is there a shortcut or setting I'm missing? Many thanks

Originally posted by @victormeldrew in https://github.com/posit-dev/positron/discussions/4349

[juliasilge]

This applies to R as well.

[seeM]

Another report of plots not working while debugging: https://github.com/posit-dev/positron/issues/8689

[jmcphers]

Had a friend of mine mention that this is a real impediment to using Positron.