Add and test CUDA support for library free functions

[mborland]

Closes: #138

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.7%. Comparing base (dd6cf2a) to head (df77270).
⚠️ Report is 37 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop    #155   +/-   ##
=======================================
  Coverage     97.7%   97.7%           
=======================================
  Files          116     116           
  Lines         8497    8497           
  Branches      3219    3219           
=======================================
  Hits          8300    8300           
  Misses         131     131           
  Partials        66      66           

Files with missing lines	Coverage Δ
include/boost/safe_numbers/bit.hpp	100.0% <100.0%> (ø)
include/boost/safe_numbers/byte_conversions.hpp	100.0% <100.0%> (ø)
include/boost/safe_numbers/charconv.hpp	100.0% <100.0%> (ø)
include/boost/safe_numbers/detail/num_digits.hpp	87.1% <ø> (ø)
include/boost/safe_numbers/detail/rtz.hpp	100.0% <100.0%> (ø)
include/boost/safe_numbers/integer_utilities.hpp	100.0% <100.0%> (ø)
include/boost/safe_numbers/numeric.hpp	100.0% <100.0%> (ø)

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[cppalliance-bot]

An automated preview of the documentation is available at https://155.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.

2026-03-27 16:09:35 UTC