LOS ANGELES — When James Harden walked into the Artesia High School gym the summer of 2003, then-coach Scott Pera said the freshman-to-be was “nothing special.” “I don’t know that he stood out above anybody else,” Pera recently told The Inquirer. “Rather, I thought a couple other kids might have had more potential than him. … At the time, he just wasn’t somebody that you thought, ‘Oh, this is a star’ or, ‘This kid has everything it takes.’ You just didn’t think it. Nobody did.” Pera realizes how preposterous that initial evaluation must seem today. But before becoming “The Beard,” before winni…