I can't find the class MogreNewt.BasicFrameListener or similar.
It seems so that the author forgot to wrap it.
Is it so?
If yes - is there an easy way to add it?
The BasicFrameListener class is simply a "helper" class for the OgreNewt demos, it's like ExampleFrameListener for Ogre, so it is not recommended for using beyond learning the basics. If you need it, it is easy to port to C#, you can look at the OgreNewt sources.
@ProfesorX is correct. If you look in "MogreNewt\Samples\Basics\Basics.cs" you'll find this:
// The basic OgreNewt framelistener with time slicing
bool Newton_FrameStarted(FrameEvent evt)