fix(data): fix inverted M0 on a test sample

add usage tutorial

add config files used to easily use dataset

Update README.md

doc(README): document split strategy, and mention measure imbalance

Merge branch 'main' of https://huggingface.co/datasets/DigitalHolography/HoloDopplerSegISBI

add metadata

Update README.md

First commit : scripted train/test split with README

initial commit