Changes in version 1.0.0                        

  - Initial release (renamed from TCA to SVARtca to avoid CRAN name
    conflict).
  - Implements Transmission Channel Analysis (Wegner, Lieb,
    Smeekes 2025).
  - Three decomposition modes: overlapping, exhaustive 3-way,
    exhaustive 4-way.
  - Systems form construction from VAR coefficient matrices.
  - Integration with the vars package via tca_from_var().
  - Plotting with plot_tca() (ggplot2).
  - Binary additivity validation with tca_validate_additivity().