Export the rest of the headers

[n0F4x]

At the moment, only the following is part of the fastgltf module

#include <fastgltf/core.hpp>
#include <fastgltf/base64.hpp>
#include <fastgltf/tools.hpp>

This issue proposes exporting the rest of fastgltf's code (like glm_element_traits.hpp).

[spnda]

To be clear here, those three includes will expand to include everything but the specialized element traits headers, since core includes types, which in turn includes math and util.

Making glm_element_traits.hpp part of the cxx module would require the fastgltf target to link glm, at least that is my current understanding. I'm not sure how that would work, but I think in the current way of including that header into a local module with glm imported (which I think should work?) would be less pain for end users, since no CMake trickeries would be required.

If I'm wrong about the element traits headers please correct me, I barely use cxx modules myself because they're not far enough yet for my uses. Though I think for the other headers this issue is void.

[n0F4x]

Both including and importing could work.
mp_units may be a good example. It exposes its module and includes fmt.
We would need to test what works. I am also not a guru on the topic.

[n0F4x]

I also don't see dxmath_element_traits included anywhere.

[spnda]

Yes, as intended, since it's also an element traits header.