Generate responses that can be used for the MUPP model.
simulate_mupp_resp(persons, items)persons data.frame with column names
[person, dim, theta]
items data.frame with column names
[item, statement, dim, alpha, delta, tau]
a data.frame of [person x item x response pattern]
The persons and items df needs to look identical to that coming from
simulate_mupp_params or else this function will not work.