chore: update pdc docs

[Timongcraft]

• Refactor examples to use ItemStack instead of ItemMeta
• Cleanup for PDC docs

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[Strokkur424]

In general I think you could provide more JavaDoc links here and there

[Timongcraft]

In general I think you could provide more JavaDoc links here and there

As I see it the docs only link to stuff one timer per document and I think that is fine

[Timongcraft]

ahhh, you can't use double underline?

[zlataovce]

this should be just an aside

Suggested change

## Read-only containers

[Timongcraft]

No, because then it wouldn't be in the sidebar

[zlataovce]

if it's supposed to be a full-fledged section, it should elaborate on the purpose and benefit of accessing a view instead of a mutable version in general, not just a single note that duplicates information from the "Storing on different objects" section

[Timongcraft]

it should elaborate on the purpose and benefit of accessing a view instead of a mutable version in general
What should I elaborate on (other than not accidentally modifying the data)?
Also there's no "benefit", it is just that you can't get a normal container from e.g. an OfflinePlayer.

[zlataovce]

well currently the purpose of the view is to side-step technical limitations, like the ItemMeta snapshot costliness or the file I/O intensity of having a mutable offline player PDC, which is pretty noteworthy

[Timongcraft]

Alright, is this good then?

[Lulu13022002]

This now feels kinda redundant with the adding data section, might just link that part of the page in the above section and drop the 1.20.4 compat (which add a bit of complexity to the page). Same for the getting data section imo that part is too complex and should show a simple use case (like the world for example) for newbie and then expand on the read only view like you already did.

[Timongcraft]

This has a bit of extra info though and I don't get why you wouldn't want compat for old versions? Also in the "adding data" section the "getting data" for a world is already included, so I thought explaining the view stuff here would be a good idea. But do you think there should just be an extra example of the world first or what exactly do you mean?