Add support for modular build structure. #50

Job	Run time
posix (gcc-12, 03,11,14,17,2a, ubuntu-22.04, cxxflags=--coverage -fsanitize=address,leak,undefine...	4m 38s
windows (msvc-14.0, 14,latest, 32,64, windows-2019)	3m 5s
posix (gcc-11, 03,11,14,17,2a, ubuntu-22.04, cxxflags=--coverage -fsanitize=address,leak,undefine...	3m 38s
windows (msvc-14.2, 14,17,20,latest, 32,64, windows-2019)	6m 6s
windows (msvc-14.3, 14,17,20,latest, 32,64, windows-2022)	6m 43s
windows (clang-win, 14,17,latest, 32,64, windows-2022)	8m 22s
windows (gcc, 03,11,14,17,2a, 64, windows-2019)	3m 32s
posix (gcc-10, 03,11,14,17,2a, ubuntu-22.04, cxxflags=--coverage -fsanitize=address,leak,undefine...	3m 44s
posix (gcc-9, 03,11,14,17,2a, ubuntu-22.04, cxxflags=--coverage -fsanitize=address,leak,undefined...	3m 33s
posix (clang, clang++-14, 03,11,14,17,2a, ubuntu-22.04)	3m 20s
posix (clang, clang++-10, 03,11,14,17,2a, ubuntu-20.04)	2m 54s
finish	4s
	49m 39s

Provide feedback