Move followage controller code to separate service

[victorwrotethis]

The FollowAgeController contains a lot of logic in it that should be in a FollowAgeService in the twitch package instead.

• Create FollowAgeService with component annotation
• Inject new service into controller and move dependencies to service only.

Optional

• Code cleanup (remove unnecessary code)
• Change izo to 'main-streamer' and move it to its own StreamerConfiguration.
• Include proper logger instead of stdout;
• Make code less ugly and into more methods;