Start using isort and black code formatters

[WilliamJamieson]

Apply the the code formatters:

• isort to consistently sort imports
• black to consistently format the code base.

These will help keep the codebase consistently formatted, and are recommend to be used in conjunction with the ruff linter that stpipe is already using.

I also adjusted the the line-length restriction from 130 down to a more reasonable (and the black standard) length of 88.

Note that this is base on PR #79 and so it should be merged after it.

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: -0.14 ⚠️

Comparison is base (0a1d4eb) 54.17% compared to head (565b035) 54.03%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #80      +/-   ##
==========================================
- Coverage   54.17%   54.03%   -0.14%     
==========================================
  Files          25       25              
  Lines        3055     3046       -9     
==========================================
- Hits         1655     1646       -9     
  Misses       1400     1400              

Impacted Files	Coverage Δ
src/stpipe/__main__.py	100.00% <ø> (ø)
src/stpipe/cli/__init__.py	100.00% <ø> (ø)
src/stpipe/cli/command.py	72.72% <ø> (ø)
src/stpipe/datamodel.py	61.11% <0.00%> (ø)
src/stpipe/exceptions.py	66.66% <ø> (ø)
src/stpipe/function_wrapper.py	0.00% <ø> (ø)
src/stpipe/hooks.py	0.00% <0.00%> (ø)
src/stpipe/integration.py	100.00% <ø> (ø)
src/stpipe/subproc.py	0.00% <0.00%> (ø)
src/stpipe/tests/test_abstract_datamodel.py	0.00% <ø> (ø)
... and 13 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[zacharyburnett]

Looks good, nice commit separation