feat: add docs for json schemas

[alexanderniebuhr]

Description (required)

This PR adds docs for the following Core PR: withastro/astro#11379

The feature was experimental before:

• feat: experimental content collection JSON schemas astro#10145
• https://docs.astro.build/en/reference/configuration-reference/#experimentalcontentcollectionjsonschema

Related issues & labels (optional)

• Closes #
• Suggested label:

For Astro version: 4.12. See astro PR #11379.

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[sarah11918]

Hey @alexanderniebuhr ! I looked at the core astro PR and looks like there might still be some questions there about the implementation?

Since I don't see discussion/confirmation there yet that this feature is "in its final form", just a heads up that I'll wait to review (both of these PRs) until I know this is what the feature will look like for sure! Don't hesitate to ping me when it's time for me to really take a close look OR if you have specific questions about the feature you'd like my input on while it's being finalized! 🙌

[sarah11918]

Thanks @alexanderniebuhr ! Always nice to get features out of experimental and properly into docs! That means the docs have a slightly higher standard, so I've left some comments, including a question for how we introduce the purpose of this feature! 🙌

[alexanderniebuhr]

Thanks for your review. It's a while back, since my last docs work.. so yeah need to reactivate this knowledge 🤷

[sarah11918]

Looks like Matthew wants this one for 4.13, fyi!

[sarah11918]

Sorry, clicked start a review instead of comment, and I don't think I can cancel this. Just meant to add on another comment to our thread!

[sarah11918]

Thank you @alexanderniebuhr ! I consider this one ready to go whenever the feature is released (which I think is scheduled for 4.13) 🙌

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[alexanderniebuhr]

@sarah11918 updated docs, after the config flag was removed from the core PR

[sarah11918]

Thanks @alexanderniebuhr for the ping! Still approved by me, and I've gone and commented in the other astro PR for help drafting the changeset, which I'll review after you put something together!