Suggested syntax for op-mode:
```
show configuration json
```
For example, it will be easier to get information in `json` format for some automation tools like ansible
https://github.com/ansible-collections/vyos.vyos/blob/0a43a34d544d6f4f6055aa8a534fcf602fd235f2/plugins/cliconf/vyos.py#L97-L112