I'm looking to avoid using tRPC with Next.js in favor of Next.js server actions. However, I'm encountering challenges with error handling. When I throw an error in a server action, it consistently returns a 500 status code, and I can't find a way to customize this behavior. Additionally, I’m unable to determine if the thrown error is of a specific type using error instanceof MyCustomError. How can I better manage error handling in this scenario?