ECS support

[VarLad]

Are you planning to implement an entity component system (like the one in Bevy)? :)

[Kyjor]

Not at the moment. I think something like that would be pretty great to have, but it would take a lot of refactoring work. Down the line, I think it would be a nice addition to the engine, but that will probably be at least a year from now. I will keep this open though, because if anyone feels they are up to the task, I will definitely welcome a pr.