feat(network): detect IWD connection state in known_connections

[dacrab]

Replaces the TODO placeholders for state and working in IWD's known_connections by querying each station's State and ConnectedNetwork properties to determine the actual connection state.

[romanstingler]

This is a performance concern self.stations() is called inside the loop.
stations() is list_proxies!(...) over the zbus object manager. Every iteration re-enumerates station proxies.

move the lookup out of the loop:

let stations: HashMap<_, _> = self
    .stations()
    .await?
    .into_iter()
    .map(|s| (s.inner().path().clone(), s))
    .collect();

for (n, signal_strength) in nets {
    ...
    let station = stations.get(&device_path);
    ...
}

[dacrab]

Good catch — moved the stations() call out of the loop and into a HashMap lookup before iterating. Pushed in 194ba7c.

[MalpenZibo]

For me it's ok! Let's wait @romanstingler

[dacrab]

Rebased on latest main and resolved merge conflict (upstream renamed AccessPoint → AccessPointData). @romanstingler your concern about stations() being called in the loop was already addressed in the previous commit — it now uses a single HashMap lookup.