Nested header on input

I see that it is a common pattern with `Huma` that the body, both in the input and output, is to be created inside the nested struct field `Body`. Is it possible to do the same with headers and path/query parameters? Something like:

```go
type MyInput struct {
Headers struct {
UserIP string `header:"user-ip"`
}
Body struct {
Name string `json:"name"`
}
}
```