[Feature Request]: Grafana dashboard to display /metrics?

### Is there an existing issue for the same feature request?

- [X] I have checked the existing issues.

### Is your feature request related to a problem?

```Markdown
Would it be possible to produce a Grafana dashboard to display the content of /metrics?
```

### Describe the feature you'd like

Would it be possible to produce a Grafana dashboard to display the content of /metrics?

I also use vLLM metrics to display a dashboard, which has way more informations about GPU usage, maybe it would be good as well to expose more GPU metrics like vLLM does.

### Describe implementation you've considered

Publish a grafana.json file.

### Documentation, adoption, use case

```Markdown
None
```

### Additional information

None

Start by inspecting the /metrics endpoint and determine which metrics the proposed dashboard should display, including the mentioned GPU metrics. Use the requested grafana.json deliverable as the output target; done means a published dashboard that represents the selected /metrics data.

Written by the indexing model from the issue text.