Feat: Add connection success logging

Added a qDebug() statement in hgx11net::_connectHost() to log a
successful connection to the Hyperion server. This will help confirm
that the network connection is established before any commands are
attempted to be sent.

hgx11net.cpp

@@ -74,6 +74,7 @@ void hgx11net::_connectHost()
         qWarning() << "hxgfnet Error: " << _sock_p->errorString();
         return;
     }
+    qDebug() << "Successfully connected to Hyperion at " << _host_m << ":" << _port_m;
 }
 
 void hgx11net::_sendCommand()