refactor(configuration): throw warning and not error for invalid files

[maryliag]

Throw a warning and not an error for invalid config files.
It also exports model required for later usage in other PRs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.21%. Comparing base (6bd0bc4) to head (4313e7a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6124   +/-   ##
=======================================
  Coverage   95.21%   95.21%           
=======================================
  Files         316      316           
  Lines        9388     9390    +2     
  Branches     2168     2168           
=======================================
+ Hits         8939     8941    +2     
  Misses        449      449           

Files with missing lines	Coverage Δ
...al/packages/configuration/src/FileConfigFactory.ts	94.05% <100.00%> (+0.01%)	⬆️

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[raphael-theriault-swi]

Minor wording nitpicking

[raphael-theriault-swi]

Thank you for the revisit !