CRAN Lister
Implemented CRAN lister which uses build in API in R to list the packages in JSON format. That JSON string is passed to the lister.py which then extract all the information to create an origin form the JSON passed by the R script.
Here is the short snippet of the complete response of R script https://forge.softwareheritage.org/swh/meta$404 Closes T1709
Migrated from D1492 (view on Phabricator)