Supporters of Zohran Mamdani celebrate during an election night event at the Brooklyn Paramount Theater on Tuesday. Photo: Angelina Katsanis/AFP/Getty Images When New Yorkers elected Zohran Mamdani , they gave a much-needed boost to the next mayor by approving ballot measures that will ease the process of building housing, which experts say will be a boon to the mayor-elect’s ability to deliver on his campaign pledge to make the city more affordable. Ballot questions Nos. 2 and 3 create a fast-