Constructs a probability box (pbox) by automatically selecting the best marginal distribution
and copula for a given dataset. This function facilitates the creation of a pbox object,
which encapsulates the uncertainty and dependencies of the input data.
`set_pbox` method that utilizes data frames or data tables to configure a comprehensive
pbox structure. The method involves stages of distribution fitting and copula selection,
executed through external functions presumed to be available in the working environment
or described in the package.