Add ci-template-check.yml

[trexfeathers]

For detailed context, see the following:

• Add ci-template-check.yml workflows#115
• Script to make PR authors aware if they are modifying templated files .github#41

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.81%. Comparing base (1ee5b6b) to head (bcef1f8).
Report is 39 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #628   +/-   ##
=======================================
  Coverage   89.81%   89.81%           
=======================================
  Files           8        8           
  Lines        2475     2475           
  Branches      406      406           
=======================================
  Hits         2223     2223           
  Misses        155      155           
  Partials       97       97           

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[ESadek-MO]

LGTM, thanks @trexfeathers