fix: allow to set all configs via tesseract build --config-override

[dionhaefner]

Relevant issue or PR

Fixes #232

Description of changes

• Parse values passed as YAML, so arguments that expect lists (like build_config.package_data) can be set.
• Some more error checking and helpful error messages for good measure.
• Add more testing to ensure things work as intended.

Testing done

CI, old and new tests

[codecov]

Codecov Report

Attention: Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.

Project coverage is 70.16%. Comparing base (2369668) to head (5d06926).

Files with missing lines	Patch %	Lines
tesseract_core/sdk/cli.py	45.45%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #239      +/-   ##
==========================================
+ Coverage   70.03%   70.16%   +0.13%     
==========================================
  Files          28       28              
  Lines        3157     3161       +4     
  Branches      505      505              
==========================================
+ Hits         2211     2218       +7     
+ Misses        729      728       -1     
+ Partials      217      215       -2     

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[johnbcoughlin]

Thanks for the quick fix!