mqqcause 1.0.0

• Initial CRAN release.
• qq_causality() for bivariate Quantile-on-Quantile Granger causality (Sim and Zhou 2015 framework) and mqq_causality() for the conditional version that adds a vector of moderators and optional x * Z interaction terms (Sinha et al. 2024).
• sup_wald() summary across (theta, tau) with Bonferroni adjustment (Troster 2018).
• 3D surface, heatmap, contour and significance-only heatmap visualisations (plot_qq_causality_3d, plot_qq_causality_heatmap, plot_qq_causality_contour, plot_significance_heatmap).
• MATLAB Parula default colour scale, plus Jet, Turbo, BlueRed and the Sinha red-yellow-black palette.