Implement a StylesProvider

[conico974]

This PR introduce a StylesProvider that we can use to pass tailwind css classes to client component.
It reduces the size of the RSC.
With this PR and #3339 , we can in some worst case scenario go from 41.8Mb to 14.3.
And we can iterate on this PR to improve this even further

[changeset-bot]

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Latest commit: a6ef878

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[github-actions]

Summary of the deployments:

Version 1

Version	URL	Status
Latest commit	https://b0e05f67.gitbook-open.pages.dev	✅
PR	https://pr3352.gitbook-open.pages.dev	✅

Version 2

Version	URL	Status
Vercel	https://gitbook-v2-2ojn4vecn-gitbook.vercel.app	✅
Cloudflare	https://a625b50d-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	v1	2v	2c
GitBook	https://b0e05f67.gitbook-open.pages.dev/gitbook.com/docs	https://gitbook-v2-2ojn4vecn-gitbook.vercel.app/url/gitbook.com/docs	https://a625b50d-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://b0e05f67.gitbook-open.pages.dev/gitbook.gitbook.io/test-gitbook-open	https://gitbook-v2-2ojn4vecn-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://a625b50d-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v1 (Inspect)	✅ No changes detected	-	Jun 18, 2025, 3:37 PM
customers-v2 (Inspect)	👍 Changes approved	77 changed	Jun 18, 2025, 3:38 PM
default (Inspect)	✅ No changes detected	-	Jun 18, 2025, 3:41 PM
v2-cloudflare (Inspect)	✅ No changes detected	-	Jun 18, 2025, 3:43 PM
v2-vercel (Inspect)	👍 Changes approved	1 changed	Jun 18, 2025, 3:45 PM

[gregberge]

We already have a solution for that: CSS or Tailwind utilities. Introducing another thing like that is not the way to go.

Unblocking