feat: cursor implemented

sql/sqlc.yaml

@@ -12,6 +12,7 @@ sql:
         sql_driver: "github.com/jackc/pgx/v5"
         emit_json_tags: true
         emit_pointers_for_null_types: true
+        emit_empty_slices: true #slices returned by :many queries will be empty instead of nil
         overrides:
           - db_type: "uuid"
             nullable: false