Add support for Model Card reporting

[isabelizimm]

Once a VetiverModel is created, we would like to nudge users to create a model card for reporting relevant information about the model. We would like some of this to be automatically populated, possibly by using a Quarto template.

Considerations:

• how can users create this model card?

ideas: maybe users create this through CLI (which feels clunky), or have a function to automatically generate the template in user's directory, where they can edit at their discretion

Original paper: https://arxiv.org/pdf/1810.03993.pdf
VetiveR model card: https://github.com/tidymodels/vetiver/blob/main/vignettes/model-card.Rmd

[isabelizimm]

After looking around, the most relevant example of this may be Google’s Model Card Toolkit demo and example which uses a JSON Schema.