chore(deps-dev): bump svelte from 5.55.0 to 5.55.7

Bumps [svelte](https://github.com/sveltejs/svelte/tree/HEAD/packages/svelte) from 5.55.0 to 5.55.7.
- [Release notes](https://github.com/sveltejs/svelte/releases)
- [Changelog](https://github.com/sveltejs/svelte/blob/main/packages/svelte/CHANGELOG.md)
- [Commits](https://github.com/sveltejs/svelte/commits/svelte@5.55.7/packages/svelte)

---
updated-dependencies:
- dependency-name: svelte
  dependency-version: 5.55.7
  dependency-type: direct:development
...

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

Author: dependabot[bot]

packages/svelte-core/package.json

@@ -40,7 +40,7 @@
   "devDependencies": {
     "@sveltejs/vite-plugin-svelte": "^5.0.3",
     "@gridsheet/functions": "workspace:*",
-    "svelte": "^5.28.2",
+    "svelte": "^5.55.7",
     "vite": "^6.3.5",
     "vite-plugin-dts": "^4.5.3"
   },