Deprecate /rows, and replace /splits with the current /splits-next
This will make it clearer that we only return the first rows. The idea is to keep this endpoint even when random access will be available (#13):
- /first-rows will use streaming to give access to the first rows very quickly after a dataset has been created or updated
- /rows will allow access to all the rows but will only be available once the dataset has been downloaded


Deprecate /rows, and replace /splits with the current /splits-next: This will make it clearer that we only return the first rows. The idea is to keep this endpoint even when random access will be available (#13):
- /first-rows will use streaming to give access to the first rows very quickly after a dataset has been created or updated
- /rows will allow access to all the rows but will only be available once the dataset has been downloaded

