* build.sh: support building SDL3 with cmake
* ci: install cmake
* ci: make msvc use bash to build again
* ci: use get-command to get link.exe
* build.sh: revert back to CMAKE_INSTALL_PREFIX
* ci: hardcode CMAKE_INSTALL_LIBDIR
* ci: set cc_ld to not step on cmake
* build.sh: less messing with cwd
* build.sh: fix prefix once and for all
* ci: skip installing cmake on macos to avoid warnings
* build.sh: pass MACOSX_DEPLOYMENT_TARGET to cmake
* build.sh: remove extra .. in configure command
* build.sh: remove unused variable
* build.sh: allow SIMD runtime detection
* build.sh: propagate LTO to SDL3