Bump @sveltejs/vite-plugin-svelte from 5.1.1 to 6.2.4 in /frontend

Bumps [@sveltejs/vite-plugin-svelte](https://github.com/sveltejs/vite-plugin-svelte/tree/HEAD/packages/vite-plugin-svelte) from 5.1.1 to 6.2.4.
- [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@6.2.4/packages/vite-plugin-svelte)

---
updated-dependencies:
- dependency-name: "@sveltejs/vite-plugin-svelte"
  dependency-version: 6.2.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -14,7 +14,7 @@
     "test:watch": "vitest"
   },
   "devDependencies": {
-    "@sveltejs/vite-plugin-svelte": "^5.0.0",
+    "@sveltejs/vite-plugin-svelte": "^6.2.4",
     "@tailwindcss/postcss": "^4.1.18",
     "postcss": "^8.5.6",
     "svelte": "^5.0.0",