feat: Add warnings when important directories are missing

[aklinker1]

This closes #515

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[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 86.51%. Comparing base (9cd4e83) to head (2820cd2).

Files	Patch %	Lines
src/core/utils/building/resolve-config.ts	90.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #516      +/-   ##
==========================================
+ Coverage   86.34%   86.51%   +0.17%     
==========================================
  Files         111      111              
  Lines        8778     8798      +20     
  Branches      860      866       +6     
==========================================
+ Hits         7579     7612      +33     
+ Misses       1185     1172      -13     
  Partials       14       14              

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