- Add Window Functions: ROW_NUMBER, RANK, DENSE_RANK, LEAD, LAG,
FIRST_VALUE, LAST_VALUE, NTILE with PARTITION BY, ORDER BY,
ROWS/RANGE frame specifications
- Add MERGE/UPSERT statement with WHEN MATCHED UPDATE and
WHEN NOT MATCHED INSERT
- Add SQL/PGQ Property Graph long-term plan in PLAN_SQL_ADVANCED.md
- Add 7 new tests for Window Functions and MERGE
- Update baraql.md documentation
