(chore): add scripts for testing only changed files

[thostetler]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.9%. Comparing base (b6389d6) to head (917412b).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #774     +/-   ##
========================================
+ Coverage    60.9%   60.9%   +0.1%     
========================================
  Files         301     301             
  Lines       35040   35040             
  Branches     1500    1499      -1     
========================================
+ Hits        21320   21321      +1     
+ Misses      13686   13685      -1     
  Partials       34      34             

see 2 files with indirect coverage changes

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