chore(deps): update dependency eslint to v9

Author: renovate[bot]

viewer/package.json

@@ -100,7 +100,7 @@
     "concurrently": "^9.0.0",
     "cross-env": "^7.0.3",
     "dat.gui": "^0.7.9",
-    "eslint": "^8.57.0",
+    "eslint": "^9.0.0",
     "eslint-config-prettier": "^10.0.0",
     "eslint-plugin-header": "^3.1.1",
     "eslint-plugin-jsdoc": "^50.0.0",