Add SqlListLazy to OrmLite
When using raw SQL, due to having complex CTE queries, that does not start with `SELECT` but rather with `WITH`, the `SqlList` method loads everything in one go.
This is unfortunate when the result set is large, and we would like to process one row at a time, and avoid the memory overhead, and waiting time, of getting the whole result set at once.
The `SelectLazy` would have solved this problem, if it had supported any arbitrary SQL, but it does not.
According to the documentation `SelectLazy` can do this if the SQL starts with `SELECT` however, for our case the query is a CTE, so it starts with `WITH`.
Having a `SqlListLazy` that allows us to run complex CTE queries efficiently would solve this.
Alternatively, change `SelectLazy` to recognise CTE queries that start with `WITH`
For documentation on the WITH syntax in PostgreSQL see https://www.postgresql.org/docs/11/queries-with.html
This should now be supported using the existing `SelectLazy` APIs from v5.7.1+ that’s now available on MyGet.