chore(deps): update dependency svelte-check to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
svelte-check	^3.8.6 -> ^4.0.1

---

Release Notes

sveltejs/language-tools (svelte-check)

v4.0.1

Compare Source

• fix: remove ancient process augmentation from internal d.ts file

v4.0.0

Compare Source

• chore: bump magic-string (#​2476)
• chore: switch from fast-glob to fdir (#​2433)
• fix: detect <script module> tag (#​2482)
• feat: better type checking for bindings in Svelte 5 (#​2477)
• feat: replace svelte-preprocess with barebones TS preprocessor (#​2452)
• feat: project reference support (#​2463)

Breaking changes

• require Svelte 4 or later (#​2453)
• make TypeScript a peer dependency, require TS 5 or later (#​2453)
• require node 18 or later (#​2453)
• process augmentation (declaring a process.browser field) was removed
• slight changes to how files are assigned to which tsconfig.json (#​1234, #​2463)
• slight changes to how Svelte module resolution works; .svelte files now take precedence over .svelte.js/ts files (if both exist) (#​2481)
• language-server now forces fewer TypeScript options. Most notably skipLibCheck is no longer forced to true, which may result in d.ts files now being checked in your project, which they were not before, revealing type errors. Either fix those or add "skipLibCheck": true to your tsconfig.json (#​1976, #​2463)

---

Configuration

📅 Schedule: Branch creation - "before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[sapphi-red]

The breaking changes should be fine for us. I tested running svelte-check and worked without any errors.