`HasKeyboardHandlerComponents` should be replaced a `KeyboardEventsDispatcher`

# What could be improved
Similarly to the `MultiTapDispatcher` a similar one should be created for keyboard events.

# Why should this be improved
So that the user doesn't have to manually add the `HasKeyboardHandlerComponents` mixin to their game.

# Any risks?
No, it will be a breaking change though, but very simple for the user to migrate since they'll just have to remove the mixin.