Better exceptions

[gtrevisan]

• be resilient to any exception within the runner
• further decorate some MDSplus exceptions
• better logs for exceptions
• avoid warnings if errors have already been raised (eg during setup)

[gtrevisan]

the old simple example, which was the cli entry point, is now in the framework with a better name (disruption-py).
the defaults example never had defaults, only an empty shotlist.

anyways, I tried with this and it seems to be resilient (yet verbose) as desired:

poetry run disruption-py -l warning 1120215001 1120801004 1120801017 1120807019 1120816012 1120831018 1120914031 1120918013 1120920023 1120921002 1120921006 1120921030 1120921033 1150528006

[AlexSaperstein]

gotcha. everything looks good when I'm running it

[yumouwei]

I like the new error log