chore(deps): update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -25,7 +25,7 @@
     "@unocss/reset": "^0.60.0",
     "@unocss/transformer-directives": "^0.60.0",
     "chart.js": "^4.3.0",
-    "eslint": "^8.44.0",
+    "eslint": "^9.0.0",
     "eslint-plugin-svelte3": "^4.0.0",
     "katex": "^0.16.8",
     "mdsvex": "^0.11.0",