Add CMake option for removing unicode from logging messages.

[daniel-zint]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 80.95238% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.62%. Comparing base (71271fb) to head (8f285ea).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/polysolve/nonlinear/Solver.cpp	55.55%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
- Coverage   82.04%   81.62%   -0.42%     
==========================================
  Files          47       49       +2     
  Lines        2049     2025      -24     
  Branches      252      269      +17     
==========================================
- Hits         1681     1653      -28     
- Misses        368      372       +4     

Flag	Coverage Δ
polysolve	81.62% <80.95%> (-0.42%)	⬇️

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