pre-commit alternative to explicit GitHub Actions for formatting

[knoepfel]

This PR pursues an alternative to explicit GitHub actions for checking/applying code-formatting. I am interested in pursuing this option because it:

1. substantially reduces the code we maintain (leveraging pre-commit's facilities)
2. retains a common point of maintenance for those who want to apply pre-commit interactively vs. the CI.

[greenc-FNAL]

Review the full CodeQL report for details.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #440      +/-   ##
==========================================
+ Coverage   84.94%   85.00%   +0.05%     
==========================================
  Files         127      127              
  Lines        3341     3341              
  Branches      574      574              
==========================================
+ Hits         2838     2840       +2     
  Misses        306      306              
+ Partials      197      195       -2     

Flag	Coverage Δ
unittests	85.00% <ø> (+0.05%)	⬆️

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see 2 files with indirect coverage changes

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