Allows passing the style of a parameter in the openapi spec.

[Nahuel-M]

Allows setting the desired parameter style as documented in the swagger documentation.
Example:

#[oai(path = "/hello", method = "get")]
async fn index(
    &self,
    #[oai(style = "deep_object")] Query(input): Query<String>,
) -> PlainText<String> {
    PlainText(format!("hello, world! {input}"))
}

This currently enables custom ApiExtractors to extract several types of objects from the path, query, or headers.
In the future, I hope to improve the default Query, Path and Header extractors to take the style into account.