Implement display for port factory for all messaging patterns

## (Code) Example Of Cumbersome API

If one would like to print a state overview of a service it would be nice if the `port_factory::{event|publish_subscribe|...}` would have implemented `Display` to show the overview from the example.

Start with the code example referenced in the issue and the port_factory definitions for the event, publish-subscribe, and other messaging patterns. Determine the state overview expected by the example; done means each listed port factory implements Display and presents that overview consistently.

Written by the indexing model from the issue text.