chore(deps-dev): bump rollup-plugin-visualizer in /frontend (#666)

Bumps [rollup-plugin-visualizer](https://github.com/btd/rollup-plugin-visualizer) from 6.0.5 to 7.0.0.
- [Changelog](https://github.com/btd/rollup-plugin-visualizer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/btd/rollup-plugin-visualizer/compare/v6.0.5...v7.0.0)

---
updated-dependencies:
- dependency-name: rollup-plugin-visualizer
  dependency-version: 7.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -51,7 +51,7 @@
     "eslint-plugin-react-refresh": "^0.5.1",
     "globals": "^17.3.0",
     "prettier": "3.8.1",
-    "rollup-plugin-visualizer": "^6.0.5",
+    "rollup-plugin-visualizer": "^7.0.0",
     "tw-animate-css": "^1.4.0",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.56.0",