[client] Add output similar to wg show to the debug package (#3922)

client/internal/engine.go

@@ -359,6 +359,7 @@ func (e *Engine) Start() error {
 		return fmt.Errorf("new wg interface: %w", err)
 	}
 	e.wgInterface = wgIface
+	e.statusRecorder.SetWgIface(wgIface)
 
 	// start flow manager right after interface creation
 	publicKey := e.config.WgPrivateKey.PublicKey()
@@ -380,7 +381,6 @@ func (e *Engine) Start() error {
 			return fmt.Errorf("run rosenpass manager: %w", err)
 		}
 	}
-
 	e.stateManager.Start()
 
 	initialRoutes, dnsServer, err := e.newDnsServer()
@@ -1453,6 +1453,7 @@ func (e *Engine) close() {
 			log.Errorf("failed closing Netbird interface %s %v", e.config.WgIfaceName, err)
 		}
 		e.wgInterface = nil
+		e.statusRecorder.SetWgIface(nil)
 	}
 
 	if !isNil(e.sshServer) {