refactor: `less`, `ceil`, and `round` refactored and improved + more … #473

Job	Run time
Generate build matrix for clang-tidy CI	4s
Clang-18 (x86-64) C++20 fmtlib gsl-lite Debug	8m 41s
Clang-18 (x86-64) C++20 fmtlib gsl-lite Release	10m 11s
Clang-18 (x86-64) C++20 fmtlib ms-gsl Debug	9m 8s
Clang-18 (x86-64) C++20 fmtlib ms-gsl Release	8m 22s
Clang-18 (x86-64) C++20 fmtlib none Debug	8m 46s
Clang-18 (x86-64) C++20 fmtlib none Release	10m 1s
Clang-18 (x86-64) C++20 std::format gsl-lite Debug	9m 23s
Clang-18 (x86-64) C++20 std::format gsl-lite Release	8m 32s
Clang-18 (x86-64) C++20 std::format ms-gsl Debug	7m 25s
Clang-18 (x86-64) C++20 std::format ms-gsl Release	8m 19s
Clang-18 (x86-64) C++20 std::format none Debug	7m 33s
Clang-18 (x86-64) C++20 std::format none Release	8m 7s
Clang-18 (x86-64) C++23 fmtlib gsl-lite Debug	7m 37s
Clang-18 (x86-64) C++23 fmtlib gsl-lite Release	10m 51s
Clang-18 (x86-64) C++23 fmtlib ms-gsl Debug	7m 39s
Clang-18 (x86-64) C++23 fmtlib ms-gsl Release	8m 19s
Clang-18 (x86-64) C++23 fmtlib none Debug	8m 8s
Clang-18 (x86-64) C++23 fmtlib none Release	7m 50s
Clang-18 (x86-64) C++23 std::format gsl-lite Debug	7m 54s
Clang-18 (x86-64) C++23 std::format gsl-lite Release	12m 51s
Clang-18 (x86-64) C++23 std::format ms-gsl Debug	8m 32s
Clang-18 (x86-64) C++23 std::format ms-gsl Release	8m 34s
Clang-18 (x86-64) C++23 std::format none Debug	7m 20s
Clang-18 (x86-64) C++23 std::format none Release	10m 50s
	3h 30m 57s

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