Changes in version 2025-03-26                      

Added

  - Initial release of the package with the core functionality for
    spatial modeling using GSAR.
  - Joint modeling of the dependent variable's mean and variance with
    spatial effects.
  - Semiparametric effects incorporated into both models for better
    flexibility and model fitting.

Fixed

  - Bug fixes in the spatial weighting matrices for better compatibility
    with different data structures.