fix: logs with utf-8 chars

[paxcut]

See the commits in imhex repo for details.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 0% with 72 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.19%. Comparing base (10ae85b) to head (05438e5).

Files with missing lines	Patch %	Lines
libs/utils/source/utils/string.cpp	0.00%	72 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #41      +/-   ##
==========================================
- Coverage   60.15%   54.19%   -5.96%     
==========================================
  Files          16       16              
  Lines         655      727      +72     
  Branches      118      137      +19     
==========================================
  Hits          394      394              
- Misses        218      290      +72     
  Partials       43       43              

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