vscode: `Oxfmt` cannot format jsonc files, such as vscode `settings.json`

```
"editor.defaultFormatter": "oxc.oxc-vscode",
"[jsonc]": {
  "editor.defaultFormatter": "oxc.oxc-vscode"
},
```

<img width="520" height="205" alt="Image" src="https://github.com/user-attachments/assets/cdc9c04f-709f-43e4-bd80-3164dc3b781f" />