Provides Bayesian quantile regression models for complex survey data
under informative sampling using survey-weighted estimators. Both single- and
multiple-output models are supported. To accelerate computation, all algorithms
are implemented in 'C++' using 'Rcpp', 'RcppArmadillo', and 'RcppEigen', and
are called from 'R'. See Nascimento and Gonçalves (2024)