This example runs two Yew apps which communicate with each other.
The example illustrates how one can take control of the mounting process which is usually done by yew::start_app.
Instead of using the same component type twice, the example could use two entirely different components that communicate with each other. One of the components could even accept a generic "remote" component using a trait.
This example is very similar to mount_point.
The two should be merged into a single example.