Understand platform specific URIs

[davidgasquez]

A sane default might be to rely on the information URIs give us and be smart about it.

For example, say we wan't to use a HuggingFace dataset, davidwisdom/fake_railroad_company. Seamless should know how to get and parse the URI hf://davidwisdom/fake_railroad_company. Same might happen with kaggle or other platform with a clear way to identify the dataset.

This is a different mode that pointing to a datapackage.yaml file though and might be confusing.