The [current doc](https://github.com/spinalcordtoolbox/manual-correction?tab=readme-ov-file#3-usage) is great to use when starting from YML file, but what if no YML file is present? (eg: labeling from scratch) The [example section](https://github.com/spinalcordtoolbox/manual-correction?tab=readme-ov-file#4-examples) does include examples of starting from scratch, but we don't intuitively find it.