Add CMake installation rules

[llm96]

Follow-up from #69, here are a few minor CMake changes to ensure things are installed to the usual places.

I'm hoping to contribute packages to vcpkg & MSYS2 afterwards.

-DBUILD_SHARED_LIBS=OFF

-- Install configuration: "Debug"
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/lib/libsafetyhook.a
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/allocator.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/common.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/context.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/easy.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/inline_hook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/mid_hook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/os.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/utility.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook/vmt_hook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/include/safetyhook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/lib/cmake/safetyhook/safetyhook-config.cmake
-- Installing: Z:/safetyhook/cmake-build-debug-static/install/lib/cmake/safetyhook/safetyhook-config-debug.cmake

-DBUILD_SHARED_LIBS=ON

-- Install configuration: "Debug"
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/lib/libsafetyhook.dll.a
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/bin/libsafetyhook.dll
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/allocator.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/common.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/context.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/easy.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/inline_hook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/mid_hook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/os.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/utility.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook/vmt_hook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/include/safetyhook.hpp
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/lib/cmake/safetyhook/safetyhook-config.cmake
-- Installing: Z:/safetyhook/cmake-build-debug-shared/install/lib/cmake/safetyhook/safetyhook-config-debug.cmake