npwbs 0.3.0

• Updated built-in Lepage thresholds to match the revised manuscript calibration for the default settings M = 10000 and d = 2.
• Clarified that the packaged thresholds support alpha = 0.05 and alpha = 0.01.
• For segment lengths above n = 10000, the package now uses the n = 10000 threshold with a warning instead of silently extrapolating.
• Clarified the returned changepoint convention: a returned value k denotes a split between observations k and k + 1.