PiChange 0.0.6

• Initial CRAN release.
• Adds normal and zero-adjusted gamma segment costs with prior-informed, time-varying penalties.
• Provides structured pi_penalty and pi_change_fit objects, including print, summary, plot, fitted-value, and change-point extraction methods.
• Includes WTI oil-price and Google workplace-mobility application vignettes.
• Uses coordinated ggplot2 penalty and detection panels with consistent colors for the observed series, segment means, prior centers, and detected changes.
• Adds readable angled date axes with exact prior and detected-change dates; nearby routine ticks are suppressed to prevent label collisions.
• Sets observed-series and segment-mean lines to half the width of prior and detected-change lines and exposes all three widths as plotting arguments.
• Records Jonathon Jacobs and Shanshan Chen as package copyright holders.