Function forward_link 

pub fn forward_link(
    namespace: &str,
    pending_refs: &[PendingRef],
    registry: &[RegisteredPackage],
    resolve_fn: &dyn Fn(&str, &str) -> Vec<SymbolMatch>,
) -> LinkResult

Forward link: resolve this namespace’s pending refs against known packages.

For each pending ref from namespace that has a package_hint matching a registered package in another namespace, attempt to match the target_name against the provided symbols from that namespace.