By Rohan Nadkarni The former first-round pick averaged 18.5 points per game with the Warriors in 2022. Jordan Poole won’t be leaving San Francisco any time soon. Poole, 23, agreed to a four-year, $140 million extension Saturday, his agents told ESPN. The former first-round pick is coming off the best season of his career, having averaged 18.5 points and 4.0 assists per game in 2022. Poole started 51 games for Golden State last year, and started five more times in the playoffs, during which he averaged 17.0 points a night to aid the Warriors’ title run. Let’s grade the deal for Golden State. Gr…