Transition to scikit-build for OpenMC

[shimwell]

Hi there, I am looking into building OpenMC using Scikit build so that it can be distributed on PyPi

I've had a go using the nice github actions examples that Scikit build offers.

I am currently running into an error where the hdf5 library can't be found and was wondering in anyone could give a few pointers.

The last Github action cmake error message from my working progress PR is

Could NOT find HDF5 (missing: HDF5_LIBRARIES HDF5_INCLUDE_DIRS
          HDF5_HL_LIBRARIES C HL) (found version "")

Just wondering if there is a best practice for including hdf5 so that cmake finds it.

I couldn't find any similar discussions so I thought it might be ok to start this one.

Many thanks

[shimwell]

adding h5py to the [build-system] requires list in this commit appears to not help.