Capabilities array in ModelInfo

I noticed the `capabilities` array was not available from `OKModelInfoResponse`. 
Could it be exposed as an optional please ?

Some models use it wisely to advertise their capabilities as follow:
```
> curl -X POST -d '{"name":"mistral-small3.1:latest"}' http://localhost:11434/api/show  | jq .
...
"capabilities": [
    "completion",
    "vision",
    "tools"
  ],
...
```

Thank you!