CI pipeline additions

[jay-tyler]

• add black and isort to CI pipeline
• add style packages to any relevant dev installations (TBD)
• add githooks to relevant CI static testing
  • will keep githooked testing short, ~few seconds at most
  • maybe hook-in unittesting, if short

[jay-tyler]

CI pipeline will eventually include all of the following

black
isort
pep8-naming
flake8-bugbear
flake8-docstrings
vulture
bandit

But flake8-docstrings will be deferred to some other issue. 657 lines of changes for that one...