Refactor 8

[michaeltintiuc]

This is the eighth step of refactoring:

• Implement events
• Connect Lever and CellarDoor through events
• Remove component state from top-level App component
• Add custom hook - useChangeEffect
• Add ability to scale Rects
• Add new collision type and ability to interact with objects
• Added generic types

We've introduced a new event system that allows components sharing the same context to communicate freely. In order to achieve that we've also created a custom hook that will only fire when inputs are changed in contrast to also executing when a component mounts.
We've been able to implement object interaction by building on our existing collision system