Docs: Use a raw query?

I made my SurrealDB driver work and am currently testing it - and while testing the more "not so standart" parts of SurrealDB, I realized that... I had no idea how to run raw queries.

```go
func main() {
adapter, err := srel.Open("ws://root:root@127.0.0.1:8000/rpc?method=root")
if err != nil {
log.Fatal(err.Error())
}
defer adapter.Close()

repo := rel.New(adapter)
sql := rel.SQL("INFO FOR ROOT;")
cursor, err := adapter.Query(context.TODO(), rel.Query{
SQLQuery: sql,
})
if err != nil {
log.Fatal(err.Error())
}
fields, err := cursor.Fields()
if err != nil {
log.Fatal(err.Error())
}
fmt.Print(fields)
}
```

Is there an easier way to construct raw queries? I can't imagine it's this convoluted... x)

Kind regards,
Ingwie

Start with the adapter.Query and rel.SQL usage shown in the issue, then inspect the project’s raw-query entry points and documentation. Done means the supported way to construct and execute a raw SurrealDB query is clarified, with a simpler example documented if one exists.

Written by the indexing model from the issue text.