Error out if not projects found

[j178]

Closes #911

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.98%. Comparing base (bb9cd2d) to head (01ce346).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/cli/run/filter.rs	16.66%	5 Missing ⚠️
src/workspace.rs	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #913      +/-   ##
==========================================
+ Coverage   89.97%   89.98%   +0.01%     
==========================================
  Files          63       63              
  Lines       11746    11756      +10     
==========================================
+ Hits        10568    10579      +11     
+ Misses       1178     1177       -1     

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