chore(deps-dev): bump vite and @sveltejs/vite-plugin-svelte

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) and [@sveltejs/vite-plugin-svelte](https://github.com/sveltejs/vite-plugin-svelte/tree/HEAD/packages/vite-plugin-svelte). These dependencies needed to be updated together.

Updates `vite` from 6.4.2 to 8.1.0
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/main/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/create-vite@8.1.0/packages/vite)

Updates `@sveltejs/vite-plugin-svelte` from 5.0.2 to 7.1.2
- [Release notes](https://github.com/sveltejs/vite-plugin-svelte/releases)
- [Changelog](https://github.com/sveltejs/vite-plugin-svelte/blob/main/packages/vite-plugin-svelte/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/vite-plugin-svelte/commits/@sveltejs/vite-plugin-svelte@7.1.2/packages/vite-plugin-svelte)

---
updated-dependencies:
- dependency-name: "@sveltejs/vite-plugin-svelte"
  dependency-version: 7.1.2
  dependency-type: direct:development
- dependency-name: vite
  dependency-version: 8.0.16
  dependency-type: direct:development
...

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Author: dependabot[bot]