friendly/genridge: Add additional plotting methods

genridge 0.8.0 (2024-11-30)

This is a major update to the package adding additional plotting methods

o Fleshed out and installed plot.precision() o Illustrate plot.precision() in README.Rmd o Added diab data, diabetes from CASI o Fixed documentation for plot.ridge() so that plot.pcaridge() is documented explicitly. o 'vif.ridge()now returns a "vif.ridge" object list to prepare for a plot method. o Addedplot.vif.ridge()to plot VIFs vs shrinkage o Addednorm.diff= sqrt((b_OLS - b_ridge)^2) as a measure of shrinkage toprecision()o Addedplot.precision()for plots of shrinkage vs. precision o Addedbest()` to display the optimal shrinkage criteria