ropensci/tarchetypes: Quarto profiles

tarchetypes 0.7.6 Support Quarto profiles through the QUARTO_PROFILE environment variable (#139, @andrewheiss). Take the basename of the source file for #129 so the output files land correctly when the source file is in a subdirectory (#129, targets issue 1047, @joelnitta). Use targets::tar_runtime_object()$store instead of targets::tar_runtime_object()$get_store() to ensure forward compatibility with targets. Use interactive test for tar_download() to avoid unpredictable network issues outside our control