Add `moyopy` as alternative backend option in place of `spglib`

[janosh]

moyopy is a successor to spglib that's faster and written in Rust. in my usage, it's 4-5x faster than spglib and gives identical results in nearly all cases. a few exceptions were reported in CompRhys/aviary#96 and since resolved in spglib/moyo#54

curious if there's any interest to adopt it in this package.

maybe helpful context: materialsproject/pymatgen#4268 recently added a get_symmetry_dataset convenience method to access moyopy symmetry analysis directly on pymatgen.core.Structure instances

[t-reents]

Hi @janosh
thanks a lot for reaching out and bringing this up. We'll definitely discuss this.