chore(dev-deps): Update dependency @mantine/core to v9

Author: renovate[bot]

package-lock.json

@@ -66,7 +66,7 @@
   "description": "",
   "devDependencies": {
     "@eslint/compat": "^2.0.0",
-    "@mantine/core": "^8.2.2",
+    "@mantine/core": "^9.0.0",
     "@tabler/icons-react": "^3.29.0",
     "@types/luxon": "^3.4.2",
     "@types/node": "^24.0.0",