style validation?

[mimshwright]

It could be helpful to have way to validate the structure of a TextStyleSet object to make sure that all values are in the correct format expected by the component. I have been working in Typescript where the compiler will warn me of any issues but for many users, they will be using JS where they won't necessarily get any warnings. Additionally, end users might be setting styles directly using text-based JSON.

Perhaps this validate function would not be part of TaggedText but a standalone function that could produce output that could be displayed to the end user without throwing an error.