Enable the use of `__uint128_t` or `uint64_t` if available #73

Job	Run time
Windows VS2019 C++20	2m 45s
Windows VS2019 -DFORCE_LIMB_WIDENESS=32 C++20	2m 44s
Windows VS2019 -DFORCE_LIMB_WIDENESS=16 C++20	2m 58s
Windows VS2022 C++20	3m 3s
Windows VS2022 -DFORCE_LIMB_WIDENESS=32 C++20	3m 19s
Windows VS2022 -DFORCE_LIMB_WIDENESS=16 C++20	3m 6s
Windows Clang C++20	2m 29s
Windows Clang -DFORCE_LIMB_WIDENESS=32 C++20	2m 33s
Windows Clang -DFORCE_LIMB_WIDENESS=16 C++20	2m 42s
Windows GCC C++20	3m 4s
Windows GCC -DFORCE_LIMB_WIDENESS=32 C++20	2m 41s
Windows GCC -DFORCE_LIMB_WIDENESS=16 C++20	2m 13s
Linux Clang C++20	34s
Linux Clang -DFORCE_LIMB_WIDENESS=32 C++20	27s
Linux Clang -DFORCE_LIMB_WIDENESS=16 C++20	28s
Linux GCC C++20	27s
Linux GCC -DFORCE_LIMB_WIDENESS=32 C++20	27s
Linux GCC -DFORCE_LIMB_WIDENESS=16 C++20	28s
Linux UNIX-POSIX C++20	27s
Linux UNIX-POSIX -DFORCE_LIMB_WIDENESS=32 C++20	26s
Linux UNIX-POSIX -DFORCE_LIMB_WIDENESS=16 C++20	31s
MacOS XCode C++20	33s
MacOS XCode -DFORCE_LIMB_WIDENESS=32 C++20	27s
MacOS XCode -DFORCE_LIMB_WIDENESS=16 C++20	28s
MacOS Clang C++20	24s
MacOS Clang -DFORCE_LIMB_WIDENESS=32 C++20	29s
MacOS Clang -DFORCE_LIMB_WIDENESS=16 C++20	39s
	40m 52s

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