Spatial Null Models and Transforms for Brain Map Comparison // Implements spatial null models and coordinate-space transformations for statistical comparison of brain maps, following the framework described in Markello et al. (2022) doi:10.1038/s41592-022-01625-w. Provides variogram-matching surrogates (Burt et al. 2020), Moran spectral randomization (Wagner Dray 2015), and spin-based permutation tests (Alexander-Bloch et al. 2018). Includes an R interface to the 'neuromaps' annotation registry for browsing, downloading, and comparing brain map annotations from the Open Science Framework ('OSF'). Integrates with 'ciftiTools' for coordinate-space transforms.