doc: Create CODEOWNERS file

[rmshaffer]

Issue #, if available:

Description of changes:
Add CODEOWNERS file to this repo.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.95%. Comparing base (a9f942d) to head (bd161b2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #26   +/-   ##
=======================================
  Coverage   56.95%   56.95%           
=======================================
  Files           5        5           
  Lines         302      302           
=======================================
  Hits          172      172           
  Misses        130      130           

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