NEW YORK — OG Anunoby left his feet. Madison Square Garden followed suit. Isaiah Hartenstein rejected Houston star Jalen Green at the rim, catalyzing an electrifying sequence that cemented the Knicks’ 109-94 victory over the Rockets on Wednesday. They are now 7-2 since the deal that sent RJ Barrett and Immanuel Quickley to Toronto for Anunoby. Josh Hart wrestled the ball away after Hartenstein’s block, then threw the ball up-court to Julius Randle, who threw it to Anunoby with a spinning, no-look touch pass for a two-handed fast-break dunk that brought the Garden to its feet. Anunoby’s dunk pu…