Nomogram feature implementation

[valentynbez]

I would like to have nomograms from fitted models implemented, as in RMS R package. That would be a really useful upgrade. This form of visual data representation gathers in popularity recently. https://www.rdocumentation.org/packages/rms/versions/6.0-1/topics/nomogram https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5451623/ https://github.com/harrelfe/rms/blob/master/R/nomogram.s