Extend netbird status command to include health information (#1471)

* Adds management, signal, and relay (STUN/TURN) health probes to the status command.

* Adds a reason when the management or signal connections are disconnected.

* Adds last wireguard handshake and received/sent bytes per peer

client/internal/dns/server_test.go

@@ -59,6 +59,10 @@ func (w *mocWGIface) SetFilter(filter iface.PacketFilter) error {
 	return nil
 }
 
+func (w *mocWGIface) GetStats(_ string) (iface.WGStats, error) {
+	return iface.WGStats{}, nil
+}
+
 var zoneRecords = []nbdns.SimpleRecord{
 	{
 		Name:  "peera.netbird.cloud",