support nesting

# direct children
```
ui5=sap.m.HBox > sap.m.Text
```

# ancestors
```
ui5=sap.m.HBox sap.m.Text
```
though this is less of a priority since you can accomplish the same thing by nesting playwright selectors:

```
ui5=sap.m.HBox >> ui5=sap.m.Text
```