As discussed during the maintainer's meeting, this PR undeprecates the
`kit.files` options. It also reverts the removal of mentions about these
options in various parts of the docs done in
sveltejs#15343

---

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Co-authored-by: Ben McCann <322311+benmccann@users.noreply.github.com>

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# Releases
## @sveltejs/kit@2.54.0

### Minor Changes

- feat: allow error boundaries to catch errors on the server
([#15308](#15308))

### Patch Changes

- chore: upgrade `devalue`
([#15535](#15535))


- fix: don't wait for remote functions that are not awaited in the
template ([#15280](#15280))


- feat: allow `resolve()` to accept pathnames with a search string
and/or hash ([#15458](#15458))


- chore: remove deprecation warnings for `config.kit.files.*` options
when validating the Svelte config file
([#15482](#15482))


- fix: handles form target attribute in remote form redirects
([#15457](#15457))

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [@sveltejs/kit](https://svelte.dev) ([source](https://github.com/sveltejs/kit/tree/HEAD/packages/kit)) | [`2.53.4` → `2.55.0`](https://renovatebot.com/diffs/npm/@sveltejs%2fkit/2.53.4/2.55.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@sveltejs%2fkit/2.55.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@sveltejs%2fkit/2.53.4/2.55.0?slim=true) |

---

### Release Notes

<details>
<summary>sveltejs/kit (@&#8203;sveltejs/kit)</summary>

### [`v2.55.0`](https://github.com/sveltejs/kit/blob/HEAD/packages/kit/CHANGELOG.md#2550)

[Compare Source](https://github.com/sveltejs/kit/compare/@sveltejs/kit@2.54.0...@sveltejs/kit@2.55.0)

##### Minor Changes

- feat: page and layout params with matchers are now type narrowed in `$app/types`, leading to better type safety when working with params in `$app/types`, `$app/state`, and hooks. ([#&#8203;15502](sveltejs/kit#15502))

### [`v2.54.0`](https://github.com/sveltejs/kit/blob/HEAD/packages/kit/CHANGELOG.md#2540)

[Compare Source](https://github.com/sveltejs/kit/compare/@sveltejs/kit@2.53.4...@sveltejs/kit@2.54.0)

##### Minor Changes

- feat: allow error boundaries to catch errors on the server ([#&#8203;15308](sveltejs/kit#15308))

##### Patch Changes

- chore: upgrade `devalue` ([#&#8203;15535](sveltejs/kit#15535))

- fix: don't wait for remote functions that are not awaited in the template ([#&#8203;15280](sveltejs/kit#15280))

- feat: allow `resolve()` to accept pathnames with a search string and/or hash ([#&#8203;15458](sveltejs/kit#15458))

- chore: remove deprecation warnings for `config.kit.files.*` options when validating the Svelte config file ([#&#8203;15482](sveltejs/kit#15482))

- fix: handles form target attribute in remote form redirects ([#&#8203;15457](sveltejs/kit#15457))

</details>

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Reviewed-on: https://forgejo.tail5a98.ts.net/gooilers123/monolith/pulls/45