Provide descriptions for custom component props.

I find descriptions of props of various built-in components very useful in the Studio. When creating custom props and states for components in Studio, it would be nice to have a helpful description field for each. I believe that’s possible when registering code components, but not via the Studio.

This can be particularly useful when sharing components, to provide some guidance to the user who may not be the creator of the component or the prop, but also for self to remember the intention of a certain prop or state.

I put together a mockup as an idea.