Add a guide on the upcoming data maps

[Matyrobbrt]

Depends on neoforged/NeoForge#519 and a PR that makes compostables a data map.

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Preview URL: https://pr-46.neoforged-docs-previews.pages.dev

[neoforged-pages-deployments]

Deploying with Cloudflare Pages

Name	Result
Last commit:	7657202ee331ba9b4fe5f16e91dcc41c9afc07ce
Status:	✅ Deploy successful!
Preview URL:	https://68f08993.neoforged-docs-previews.pages.dev
PR Preview URL:	https://pr-46.neoforged-docs-previews.pages.dev

[ChampionAsh5357]

Good for a first pass.

Few comments, but it generally feels difficult to read and understand if you don't already know how the system works. It reads as though there is a lot of assumed knowledge about the system.

[ChampionAsh5357]

Added a few more comments as I'm trying to understand this system better.

[ChampionAsh5357]

One quick comment. I think the rest is fine, though I would like one more member of the doc team to weigh in.

[IchHabeHunger54]

Generally this looks good. My main complaint is that I find it weird to split the JSON structure off into a separate article. I believe it would make more sense to include that in the main article's Usage section.
I'm also not completely sold on keeping the builtin maps in their own article, however if more systems like this are planned, then it's probably best to keep the article separate.

[Matyrobbrt]

I put the json structure in a different page because the main page is for developers and the json structure affects pack devs and users.

[XFactHD]

Looks good overall, just a few minor points