Add FPM build system to Mole for the Fortran Implementation

[joehellmersNOAA]

We would like to use FPM (Fortran Package Manager https://github.com/fortran-lang/fpm) in our MOLE Fortran implementation. The primary reason initially is so we can use Julienne (https://github.com/BerkeleyLab/julienne) for our Fortran tests.

[joehellmersNOAA]

We can go ahead and add the test as well.