Compute values for rational magnitude powers #119

Job	Run time
std::format none C++20 Clang-18 Release	4m 21s
std::format none C++20 Clang-18 Debug	3m 53s
std::format none C++23 Clang-18 Release	1m 46s
std::format none C++23 Clang-18 Debug	2m 0s
std::format gsl-lite C++20 Clang-18 Release	4m 18s
std::format gsl-lite C++20 Clang-18 Debug	3m 56s
std::format gsl-lite C++23 Clang-18 Release	1m 58s
std::format gsl-lite C++23 Clang-18 Debug	1m 55s
std::format ms-gsl C++20 Clang-18 Release	4m 31s
std::format ms-gsl C++20 Clang-18 Debug	3m 56s
std::format ms-gsl C++23 Clang-18 Release	1m 51s
std::format ms-gsl C++23 Clang-18 Debug	1m 41s
fmtlib none C++20 Clang-18 Release	4m 14s
fmtlib none C++20 Clang-18 Debug	3m 51s
fmtlib none C++23 Clang-18 Release	1m 59s
fmtlib none C++23 Clang-18 Debug	1m 48s
fmtlib gsl-lite C++20 Clang-18 Release	4m 10s
fmtlib gsl-lite C++20 Clang-18 Debug	4m 11s
fmtlib gsl-lite C++23 Clang-18 Release	1m 57s
fmtlib gsl-lite C++23 Clang-18 Debug	1m 45s
fmtlib ms-gsl C++20 Clang-18 Release	4m 28s
fmtlib ms-gsl C++20 Clang-18 Debug	3m 51s
fmtlib ms-gsl C++23 Clang-18 Release	2m 9s
fmtlib ms-gsl C++23 Clang-18 Debug	1m 51s
	1h 12m 20s

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