Add special TagComponent to be ignored (by default) by systems: Prefab/Disabled/Detached

[fernandojsg]

Some engines as flecs or unity introduces the concept of Prefab as a special component (https://docs.unity3d.com/Packages/com.unity.entities@0.11/api/Unity.Entities.EntityQueryOptions.html).
The basic idea is that you could have TagComponents eg Prefab, Disabled o Detached that by default are not included on any query. This could be done by adding a Not(Prefab) to every query by default, so they won't iterate over that entity.
The components that will be treated specially could be configurable (statically for performance reasons) eg: World({ defaultQueryComponents: Not(Prefab) }).

There is a approach to this by @robertlong here #170