✨ Set default command for each dataset

[JohnGiorgi]

Overview

This PR sets the default command for each of the dataset scripts. This allows us to drop the call to main. E.g. where before it was:

seq2rel-ds cdr "path/to/cdr"

it is now

seq2rel-ds cdr main "path/to/cdr"

I found the solution here.

Other changes

• 📚 Updates the docstring of the docred command to specify that we are downloading the end-to-end split.

Closes

Closes #25.

[JohnGiorgi]

This doesn't work because the command can't be invoked with argument (like entity-hinting). I am really not sure why.