[Feature] Keep the list of labels of a dataset as metadata
Hi,
I hope we could get a better documentation.
It took me more than 1 hour to found this way to get the label information.
It would be useful to keep the list of the labels of a dataset as metadata. Either directly in the `DatasetInfo` or in the Arrow metadata.
[Feature] Keep the list of labels of a dataset as metadata 
 It would be useful to keep the list of the labels of a dataset as metadata. Either directly in the `DatasetInfo` or in the Arrow metadata. 
 Hi,
I hope we could get a better documentation.
It took me more than 1 hour to found this way to get the label information.