This PR add a C++20 module, enable examples with the module when EXAMPLES_USE_MODULE define is set
and add xmake build system support (mainly to test module compilation, it's easier to write and use than CMake module support and i'm not a CMake user / expert)
the FROZEN_DONT_INCLUDE_STL can be set to remove #include of std lib for user that want to use C++23 std module
we need this because mixing #include \<stdheader> / import \<stdheader> with C++23 std module doesn't work well atm on clang/GCC/msvc
This PR add a C++20 module, enable examples with the module when EXAMPLES_USE_MODULE define is set and add xmake build system support (mainly to test module compilation, it's easier to write and use than CMake module support and i'm not a CMake user / expert)
the FROZEN_DONT_INCLUDE_STL can be set to remove #include of std lib for user that want to use C++23 std module we need this because mixing #include \<stdheader> / import \<stdheader> with C++23 std module doesn't work well atm on clang/GCC/msvc
to try it
install xmake: https://xmake.io/#/guide/installation
coverage is supported by using xmake coverage mode