Create an abstract controller class

This is in progress right now, but I need a class that has simple methods such as start, update and stop, that do their respective functions to Kermit. this class will NOT use any sentinet in the front end (i.e. the interface uses sentinet and thats something I (Theo) will do, otherwise, the developer doesn't need to even think about sentinet). I would prefer and abstract class that allows different types of controllers to plug into the system (i.e. wii control, keyboard control, etc). I'll create a seperate repository for these, but I'll keep all these in this repository for now. The class would look like this

```c++
KermitControlModule kermit;
kermit->start();

WiiController wii = WiiController(parameters);

kermit->load_controller(wii);
kermit->drop_controller(wii);

KeyboardController key = KeyboardController(parameters);

kermit->load_controller(key);
kermit->drop_controller(key);

kermit->stop();
```

The issue does not name any files, tests, or existing entry points. Start by locating the current Kermit control code and determine how controller loading and lifecycle methods are represented. Done means agreeing on and implementing an abstract controller design that supports Wii and keyboard controllers without requiring front-end Sentinet knowledge.

Written by the indexing model from the issue text.