docs: sync content v4 pages endpoints and fix page layout tutorial contract

[basit3407]

Summary

This replaces #78 now that the API exposes public v4/pages* endpoints.

It does two things:

• syncs the public Content API contract and generated docs for /pages, /pages/lookup, and /pages/{id}
• fixes docs/tutorials/fonts/page-layout.md so its examples match the current public v4 contract

What Changed

• updated openAPI/content/v4.json from the API repo�s current contract
• added public Content API docs for /pages, /pages/lookup, and /pages/{id} in both latest and 4.0.0
• updated the existing verses/by_page docs to reflect the current mushaf-aware public contract
• fixed page-layout.md to use:
  • x-auth-token
  • x-client-id
  • snake_case lookup response fields
• removed undocumented from / to usage from verses/by_page examples
• extended the Content API sidebar so the new Pages docs are visible in both latest and 4.0.0

Files To Review

1. docs/tutorials/fonts/page-layout.md
2. openAPI/content/v4.json
3. sidebars.js
4. docs/content_apis_versioned/verses-by-page-number.api.mdx
5. docs/content_apis_versioned/get-pages-lookup.api.mdx
6. docs/content_apis_versioned/get-pages-page-number.api.mdx
7. docs/content_apis_versioned/list-pages.api.mdx
8. docs/content_apis_versioned/4.0.0/verses-by-page-number.api.mdx
9. docs/content_apis_versioned/4.0.0/get-pages-lookup.api.mdx
10. docs/content_apis_versioned/4.0.0/get-pages-page-number.api.mdx
11. docs/content_apis_versioned/4.0.0/list-pages.api.mdx

Why This Change

PR #78 documented the pre-parity public state. Now that the API PR has added public v4/pages* endpoints, the docs should expose the actual contract instead of narrowing around the older gap.

Validation

• checked the tutorial for:
  • no Authorization: Bearer
  • no camelCase lookup fields
  • no from / to on verses/by_page
• verified openAPI/content/v4.json includes:
  • /pages
  • /pages/lookup
  • /pages/{id}
• verified the new Pages docs are wired into the Content API sidebar for latest and 4.0.0
• attempted yarn build; the repo�s Windows build path reruns yarn gen-all, so I kept the committed diff scoped to the intended Content API docs changes only

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