Spgrep

- Drop support for Python 3.8

- Make compatible with NumPy 2.0.0

- Improve comparison between linear subspaces [[53]](https://github.com/spglib/spgrep/pull/53)
- Use Grassmann distance to measure linear subspaces: {func}`spgrep.utils.grassmann_distance`
- Drop `spgrep.utils.contain_space`

- Clean documents and add JOSS draft [[50]](https://github.com/spglib/spgrep/pull/50)

- Add co-representation [[47]](https://github.com/spglib/spgrep/pull/47)
- New functions to compute co-representations for spinor
- {func}`spgrep.get_spacegroup_spinor_irreps`
- {func}`spgrep.get_spacegroup_spinor_irreps_from_primitive_symmetry`
- {func}`spgrep.get_crystallographic_pointgroup_spinor_irreps_from_symmetry`
- Require a newer spglib as dependency: ``spglib>=2.0.2``

- Add spinor representation [[41]](https://github.com/spglib/spgrep/pull/41)