feat: make subprocess executor robust against invalid encoding and ca…

[xxthunder]

…pturing output while printing

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 84.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.06%. Comparing base (40e307f) to head (4c2c66a).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/py_app_dev/core/subprocess.py	84.00%	7 Missing and 1 partial ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main       #5      +/-   ##
==========================================
+ Coverage   89.84%   90.06%   +0.22%     
==========================================
  Files          15       15              
  Lines         768      775       +7     
  Branches       92       93       +1     
==========================================
+ Hits          690      698       +8     
  Misses         57       57              
+ Partials       21       20       -1     

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