version number

[akhanf]

The Issue #67 also mentioned we should add a version number somewhere to usage, and perhaps also to outputs themselves -- maybe in a dataset_description.json file that is produced?

[akhanf]

With #210, we now have a CLI option, e.g. hippunfold --version that returns the version number.
This number exists directly in the config file (in the argparser), and is updated with github actions. Since it is in the config, you will get the version number in your dataset (in the output config folder) too.

At some point we can also introduce writing the dataset_description.json (which now also has the version number)