Rosconsole for ROS2

@dirk-thomas, thanks for the clarification. As you mentioned over email, features provided by Rosconsole in ROS1, might already exist in ROS2 through some other package. As time permits, we will verify the features that Rosconsole provides in ROS1 and based on finding, we will take further determination on porting / development effort. I hope, you are ok with this approach.