Remove the cumbersome dependency to RADIS.api

get_bdgsf_from_dataverse is calling the function RADIS.api::get_data_from_dataverse for downloading data from the dataverse.

I think that this dependency is overkill since it add a bunch of dependencies from RADIS.api such as plumber, arrow and other heavy stuff which are not relevant for RADIS.

It's preferable to copy the function RADIS.api::get_data_from_dataverse from RADIS.api (and its eventual dependencies) and eventually invert the dependency by moving this function instead of copying it (i.e. make RADIS.api dependent to RADIS).