Shortcut to set response status code

[pi0]

Describe the feature

Generally, errors can be thrown with showErrorPage or throw createError() but sometimes, a soft error behavior (as described by @danielroe) is needed, it is better to practice to also set valid response code, even if not using error/404 pages.

As suggested by @atinux, it could be nice if we introduce a shortcut utility for useRequestEvent().res.statusCode = 404.

I suggest:

setResponseStatusCode(code: number)

Additional information

• Would you be willing to help implement this feature?
• Could this feature be implemented as a module?

Final checks

• Read the contribution guide.
• Check existing discussions and issues.