Rust Guidelines: Paging page types should reference the current model/iterator guidance

[azure-sdk-automation]

Bad code snippet:

pub struct FeedPage<T> {}

What it should do:
The current Rust guidance is out of date. The feedback in APIView correctly points to the cited paging/model guidelines, but those guidelines no longer reflect the intended shape for Rust paging types in azure_data_cosmos. Please update the official Rust guideline so it clearly describes the current requirements for page types (including azure_core::Model and IntoIterator behavior, if still applicable).

Good code snippet:

pub struct FeedPage<T> {
    // page fields
}

impl<T> azure_core::Model for FeedPage<T> {
    // current expected implementation
}

impl<T> IntoIterator for FeedPage<T> {
    type Item = T;
    type IntoIter = std::vec::IntoIter<T>;

    fn into_iter(self) -> Self::IntoIter {
        // iterate over page items
    }
}

[Gaganks19]

Update Rust SDK documentation