Split a joined identifier string into individual identifiers.
Source:R/assess_data_code.R
split_identifiers.Rdrtransparent joins the data/code identifiers it extracts with " ; ". This
splits such a string (or a vector of them) into a trimmed character vector,
dropping empties. rfair's id_parse() already understands the forms it emits
(doi.org URLs, repository URLs, and identifiers.org prefix:accession codes
such as geo:GSE123 or bioproject:PRJEB123).