Tree-Spatial Scan Statistic for Cluster Detection // Implements the tree-spatial scan statistic for detecting clusters that combine both spatial and hierarchical structures, as proposed by Cancado et al. (2025) doi:10.1007/s10651-025-00670-w. The method extends Kulldorff (1997) doi:10.1080/03610929708831995 circular spatial scan statistic and the tree-based scan statistic of Kulldorff et al. (2003) doi:10.1111/1541-0420.00039 by searching for anomalies in both geographic regions and branches of hierarchical trees simultaneously. The package also provides standalone implementations of Kulldorff's circular spatial scan statistic and the tree-based scan statistic. Statistical significance is assessed via Monte Carlo simulation under a Poisson or binomial model, with optional 'OpenMP' parallelization.