getPayload helper

[danielkellyio]

Describe the feature

Would be nice I think if h3 had a helper function like getPayload

Would work just like getQuery and readBody but would work for both depending on the request method and also include the route params

Here is a proof of concept for getPayload as a utility function:
https://stackblitz.com/edit/github-dbe8gu?file=server%2Futils%2Findex.ts

(uses Nuxt getRouterParams... not sure what that would be in h3)

Would also be great to have a getValidatedPayload version that works like the query and body counterparts.

Additional information

• Would you be willing to help implement this feature?