fumadocs-ui 16.0.0

Major Changes

0ed0ca6: Change --fd-layout-width to 1600px by default

This will change the max layout width to 1600px, you can still change it back with:
```
:root {
  --fd-layout-width: 100vw;
}
```
5210f18: Set minimal React.js version to 19.2.0

19.2 has multiple crucial updates that can improve Fumadocs' performance, and it should works seamlessly on mainstream React.js frameworks.

As a consequence, Next.js 16 is now the minimal version when using Fumadocs UI because Next.js always uses the internal canary version of React.js.
42f09c3: Remove deprecated APIs
- fumadocs-ui/page:
  - removed <DocsCategory />.
  - removed breadcrumbs.full option from <DocsPage />.
- fumadocs-core/search/algolia: renamed option document to indexName.
- fumadocs-core/search:
  - remove deprecated signature of createFromSource(): migrate to newer usage instead.
```
export function createFromSource<S extends LoaderOutput<LoaderConfig>>(
  source: S,
  pageToIndexFn?: (page: InferPageType<S>) => Awaitable<AdvancedIndex>,
  options?: Omit<Options<S>, 'buildIndex'>,
): SearchAPI;
```
  - remove deprecated parameters in useSearch(), pass them in the client object instead.
- fumadocs-core/highlight: remove deprecated withPrerenderScript and loading options from useShiki().
- fumadocs-core/i18n: removed createI18nMiddleware, import from fumadocs-core/i18n/middleware instead.
- fumadocs-core/source:
  - removed deprecated transformers, pageTree.attach* options from loader().
  - removed deprecated page.file property.
  - removed FileInfo & parseFilePath utilities.

Patch Changes

1494340: Drop fumadocs-core/hide-if-empty usage, prefer user-side component overrides for precise control
de0ce6d: Add a toc-title ID to the table of contents heading for styling purposes
5966e23: Fix root toggle overflow
Updated dependencies [230c6bf]
Updated dependencies [851897c]
Updated dependencies [4049ccc]
Updated dependencies [429c41a]
Updated dependencies [5210f18]
Updated dependencies [cbc93e9]
Updated dependencies [42f09c3]
Updated dependencies [55afd8a]
- fumadocs-core@16.0.0