Create Trigger/Event Interface

[Eacaw]

Create a basic interface file that we can use to build prefab objects for the game.

Event Interface: (eg - Door)

• Should have an 'execute' method within it that can be called by the trigger to execute the designated prefab action (open the door)

Trigger Interface: (eg - Button)

• Should take in a game object event, and when triggered fire the 'execute' method on that object.

[Eacaw]

Closed as it was added in PR #26