Add logging

[jonniesweb]

Throwing up a rough PR at the moment to get this logging idea out there.

For newcomers to the library it's useful to know when messages/interactions/events are unhandled and which are handled. Adding this logging gives some insight into this.

So far I've added the basic logging configuration and started adding some logging to the Router class so far.

Enjoying the library so far! Looking forward to the day when #4 is figured out.

[jusleg]

Hey Jon 👋 thanks for the PR. This seems like a good start. I agree with you, adding logging is a great idea. The app could be more verbose when it comes to how it obtains the proper handler/action combo. We could also add logs for the interactive route.

I'm fine with the code changes. I would add a test or two for expectation of logs and then call it a day. Let me know if you want me to write the tests.