Settings enhancement

Currently adding settings is a nightmare. Multiple interfaces and structs that may contain the same settings.

The base interface should be removed since if we create settings a specific window, the game may use a different set. For example, the view (camera) settings use a different set compared to editor or the core window itself.

This goes along with #21 Inuput system, so that we can have a set of predefined key binds for all keys, but if the developer wants to create a new set they can just override the base set.

This also allows multiple layouts.