[REQUEST] Support Value Casting

[zprobst]

Is your feature request related to a problem? Please describe. It would be nice to have the ability to provide a casting mechanism for basic data manipulation.

Describe the solution you'd like Provide a series of value providers and normalizers that work to clean up values when provided to them. Casting to the basic data types.

Describe alternatives you've considered The other option you have is to write your own transformers, clean the data prior to processing or live with it. While the first two make this possible, it doesn't provide an ergonomic solution and forces you to "drop to code" more than you probably should.

Additional context N/A