neuromapr 0.2.0

• Initial CRAN submission.
• Eight spatial null model methods: variogram-matching (burt2020), SAR model (burt2018), Moran spectral randomization (moran), spin-based permutation (alexander_bloch, spin_vasa, spin_hungarian), and parcel spin (baum, cornblath).
• compare_maps() for brain map comparison with optional spatial null testing.
• generate_nulls() dispatcher for all null model methods.
• Parcellation utilities: parcellate(), unparcellate(), vertices_to_parcels(), parcels_to_vertices(), get_parcel_centroids().
• Geodesic surface distance via make_surf_graph() and get_surface_distance().
• permtest_metric() for custom metric permutation testing.
• Neuromaps annotation registry interface: neuromaps_available() and fetch_neuromaps_annotation().
• Format conversions: annot_to_gifti(), fsmorph_to_gifti().
• Coordinate-space transforms via transform_to_space() and resample_images() (requires ‘ciftiTools’).