logcumulant 0.1.0

• Initial release.
• Three nested Hotelling-type T-squared goodness-of-fit statistics (T2_all, T2_bootstrap) with parametric-bootstrap calibration.
• Three diagnostic diagrams (log_cumulant_diagram, kurtosis_diagram, cv_diagram), a combined panel (three_diagrams), a multi-dataset overlay (multi_lc_diagram), and the quick plot_lc interface.
• Maximum-likelihood fitting for six reliability families with a C++ core.
• Anderson–Darling and Cramer–von Mises tests and AIC via gof_compare_all.
• Size and power simulation utilities (size_study, power_study).
• Nine bundled reliability datasets (reliability_datasets).