Implement time-resolved PAC (Samiee & Baillet,2017)

[neurofractal]

See: https://doi.org/10.1016/j.neuroimage.2017.07.051

Also see: https://github.com/brainstorm-tools/brainstorm3/blob/bc6ccdc8e93be58bece50394234c3712e7e4c0cd/toolbox/process/functions/process_pac_dynamic.m