Formatter: Format simple model expression into a single line

Specially when used inside decorators it can be anoyoing that it creates new lines when it is a very simple format

```
@query({
format: "multi",
})

// be good to stay
@query({query: "multi"})
```

As a good start we could have those rule to decide if it should be inline:
- single property
- not overflowing the max line length
- model expression only? (no named model?)