Changes in version 0.2.0                        

  - Added px_residuals() for residual diagnostic panels.
  - Added px_vpc() for lightweight visual predictive checks.
  - Added px_npde() for NPDE-style diagnostic panels.
  - Added px_forest() for parameter and covariate effect forest plots.
  - Added px_plot_grid() for composing Pharmax plots with shared
    annotation.
  - Added a public/synthetic diagnostic gallery vignette.

                        Changes in version 0.1.0                        

  - Added theme_pharmax() for publication-ready ggplot2 styling.
  - Added px_colors(), scale_color_pharmax(), and scale_fill_pharmax().
  - Added px_spaghetti() for individual concentration-time profiles.
  - Added px_gof() for four-panel goodness-of-fit diagnostics.
  - Added px_save() for plot export with publication defaults.
  - Added testthat tests and generated roxygen documentation.