Parameterized view support

Not sure if this is a bug report or a feature request but e.g.:

```sql
create or replace view normal_view as select 1 as a;

create or replace view param_view as select 1 as a, {b:UInt8} as b;
```

Then

ch2rs normal_view

gives:

```
#[derive(Debug, clickhouse::Row)]
pub struct Row {
pub a: u8,
}
```

(as expected), but

ch2rs param_view

gives an empty struct:

```
#[derive(Debug, clickhouse::Row)]
pub struct Row {
}
```