Merge pull request #13 from stackql/claude/port-window-functions-ctes…

…-017gSQYGjQBqkJ5BQmU9nXkH

Add window function (OVER clause) and CTE (WITH clause) support

insert-returning

Summary:

- Support for `INSERT RETURNING`.
- Support for `UPDATE RETURNING`.
- Support for `REPLACE RETURNING`.
- Support for `DELETE RETURNING`.

- Clarify conflicts.

- Clarify conflicts.

- Clarify conflicts.

insert-returning

Summary:

- Support for `INSERT RETURNING`.
- Support for `UPDATE RETURNING`.
- Support for `REPLACE RETURNING`.
- Support for `DELETE RETURNING`.

support-real-type-cast

Summary:

- Support for castinc to `REAL` (numeric) data type.
- Both `sqlite` and `postgres` support this type.

update-replace-synonym

Summary:

- `UPDATE` statements now support `REPLACE` as the verb.
- This is in support of nuanced routing in `stackql`.

- Remove reduce reduce conflict.

- Remove reduce reduce conflict.