Compute values for rational magnitude powers #127

Job	Run time
std::format none C++20 Clang-18 Release	4m 59s
std::format none C++20 Clang-18 Debug	4m 52s
std::format none C++23 Clang-18 Release	6m 5s
std::format none C++23 Clang-18 Debug	5m 23s
std::format gsl-lite C++20 Clang-18 Release	5m 15s
std::format gsl-lite C++20 Clang-18 Debug	4m 51s
std::format gsl-lite C++23 Clang-18 Release	5m 9s
std::format gsl-lite C++23 Clang-18 Debug	5m 4s
std::format ms-gsl C++20 Clang-18 Release	5m 7s
std::format ms-gsl C++20 Clang-18 Debug	4m 50s
std::format ms-gsl C++23 Clang-18 Release	5m 11s
std::format ms-gsl C++23 Clang-18 Debug	5m 2s
fmtlib none C++20 Clang-18 Release	5m 3s
fmtlib none C++20 Clang-18 Debug	5m 23s
fmtlib none C++23 Clang-18 Release	4m 53s
fmtlib none C++23 Clang-18 Debug	4m 41s
fmtlib gsl-lite C++20 Clang-18 Release	4m 58s
fmtlib gsl-lite C++20 Clang-18 Debug	5m 0s
fmtlib gsl-lite C++23 Clang-18 Release	5m 1s
fmtlib gsl-lite C++23 Clang-18 Debug	4m 47s
fmtlib ms-gsl C++20 Clang-18 Release	5m 0s
fmtlib ms-gsl C++20 Clang-18 Debug	4m 53s
fmtlib ms-gsl C++23 Clang-18 Release	5m 25s
fmtlib ms-gsl C++23 Clang-18 Debug	5m 0s
	2h 1m 52s

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