Utilities for wavelet analysis, including Weighted Wavelet Z-transform (WWZ) and Continuous Wavelet Transform (CWT) à la Torrence & Compo 1998.

Includes multiple options for WWZ (Fortran via f2py, numba, multiprocessing) and enables cross-wavelet transform with either WWZ or CWT.

Designed for NumPy arrays, either evenly spaced or not (method-dependent)