Add backend for nblib listed forces API

Add backend for nblib listed forces API

This adds the back-end for the nblib API defined in
listed_forces/bondtypes.h and listed_forces/definitions.h.
Additionally, header and source are added for the private
implementations of these files. These are implementation details,
and are not visible to or interactable with by the user, so they
are not part of the public API. This backend is a ground up refactoring
 of gromacs, copying the force and energy kernels but rewriting the disipatch.
There are tests that compare forces and energies to gromacs.

Each function in this commit has at least one test for correctness,
though in most cases there are many more since the functionality is
cumulative. All of this functionality has undergone extensive design
review and code review already, so it should not be necessary to go
through the whole change with a fine-tooth comb. Suggestions on how
implementations could be improved are welcome. However, they will
likely need to be addressed as follow-up issues unless they are
trivial to fix.