Morphometrics: feature extraction + classification model training

Fixes #14.

Description

Introduce the two commands:

All the following needs to be run from dvc/:

cd dvc/

Feature extraction can be tested with the following command.

dvc stage list --names-only | grep "morphometrics-feature-extraction" | xargs dvc repro -f -s

Notice that this command takes a few hour, so if you only need to fetch the results you can just do:

dvc stage list --names-only | grep "morphometrics-feature-extraction" | xargs dvc pull

Model training can be tested with the following command. You can safely run it on your laptop, it will only take a couple of minutes.

dvc stage list --names-only | grep "train-morphometrics" | xargs dvc repro -f -s

[x] This PR refers to an issue from the issue tracker. (if it is not the case, please create an issue first).
[x] Type annotations added. (if a function is added or modified)
[x] All CI tests pass.