feat(server/world): Implement armor visiblity to per-viewer view layers

[cqdetdev]

A caveat to b9a408a is that armor is not hidden when a player goes out of a view. This means that a player could still be visible if they are wearing armor which may be an unintended side effect.

This PR implements the ability to manually choose to display armor as visible.

[RestartFU]

I think we should also be able to view specific armour, not just be either hidden or visible

[cqdetdev]

Good idea, i'm just not sure the use case for individual pieces but I can add it. Just need to make it clean

[RestartFU]

Good idea, i'm just not sure the use case for individual pieces but I can add it. Just need to make it clean

well I don't think it should be based on visibility, I think we should be able to set specific armour pieces, and if we want no armour, we can just have 4 empty stacks (or an empty inventory)

[cqdetdev]

That's what I meant. What I mean is like if a user wants a player invisible in the first place 99% of the time they'd want their armor invisible too and not probably only enable helmet but I guess you implemented that in one of your things so IG there is a usecase

[cqdetdev]

@RestartFU Have a look

[RestartFU]

I like that better, I'll take a deeper look tonight