Visibility inheritance should ignore parents without a `Visibility` component

[Alainx277]

What problem does this solve or what need does it fill?

When creating a hierarchy of objects, where some of them have meshes but the root does not, the children will not render. This is due to the fact that the parent requires a VisibilityBundle so the children are visible_in_hierarchy.

What solution would you like?

If a parent entity doesn't specify any visibility, the direct descendants should automatically have visible_in_hierarchy set to true (currently false).

What alternative(s) have you considered?

Rely on the user to know every object in the hierarchy needs a VisibilityBundle so child objects are also visible. This means it has to be clearly documented and shown to beginners (similar to GlobalTransform).

As a personal anecdote: I've wasted quite some time debugging because I didn't know about this (as it is new in 0.8). I imagine many new-ish Bevy users will experience this problem.

[nicopap]

I'm in favor of this change, but if for whatever reason it is refused, please see #5590

[mockersf]

I think this is an issue mostly for existing users who are not used to the new requirement, or using older tutorials. New users following up to date docs shouldn't (hopefully) have the issue.

This would need to completely rework how inheritance currently works as it uses the component as a filter.