deriva 0.1.0

• Initial CRAN release.
• 22 drift detectors: DDM, EDDM, HDDM_A, HDDM_W, EWMA, RDDM, STEPD, FHDDM, FHDDMS, MDDM_A/E/G, WSTD, FTDD, FPDD, FSDD, CUSUM, KSWIN, ADWIN, Page-Hinkley, SEED, SeqDrift2.
• Tidy interface: drift_detector() → fit() → advance() with augment(), tidy(), glance(), and autoplot() generics.
• detect_drift() one-shot shortcut.
• add_prediction_error() bridge from tidymodels workflows.
• sim_drift_stream() and sim_dist_stream() for synthetic benchmarking.