Define data column defaults for various softwares
define_data_columns(sim, obs, sim_cols, obs_cols, software_type)
simulated data
observed data
list for mapping simulation data columns, e.g. `list(dv = "DV", id = "ID", idv = "TIME", pred="PRED")`
list for mapping observation data columns, e.g. `list(dv = "DV", id = "ID", idv = "TIME", pred="PRED")`
software type, one of `nonmem`, `phoenix`, `PKPDsim`