Feature request: standard diagnostic plots

[KOVALW]

Diagnostics we want to build should inform the post-processing steps we build first.

Notes on helpful plots and diagnostics to have:

• Marginal score by parameter: can be specified and defaults to all
• Default plot function that either plots: pairs plots histogram if length of parameters is one parameters is a specified or defaults to all
• Correlation coefficients across parameters in posterior
• Posterior prior comparison: densities or histogram parameter specified or default to all
• Sequential filtering diagram: mermaid sankey diagram Stacked histograms Parameter values accepted over "time" in sequential steps
• Parameter acceptance rates
• Bayes factors of prior vs posterior