Add float CUDA testing and delete float operator%

[mborland]

Closes: #219

[cppalliance-bot]

An automated preview of the documentation is available at https://224.safe-numbers.prtest3.cppalliance.org/libs/safe_numbers/doc/html/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-06-25 21:17:21 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.4%. Comparing base (029e858) to head (89dd0e9).
⚠️ Report is 4 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop    #224     +/-   ##
=========================================
+ Coverage     97.3%   97.4%   +0.1%     
=========================================
  Files          209     207      -2     
  Lines        15266   15063    -203     
  Branches      5807    5722     -85     
=========================================
- Hits         14853   14660    -193     
+ Misses         336     326     -10     
  Partials        77      77             

Files with missing lines	Coverage Δ
include/boost/safe_numbers/bounded_floats.hpp	94.9% <ø> (-0.5%)	⬇️
include/boost/safe_numbers/detail/float_basis.hpp	79.5% <100.0%> (-<0.1%)	⬇️

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