NEW YORK — Stormy Daniels was in Manhattan federal court Thursday to square off with Michael Avenatti, her former lawyer and onetime ally who the feds charge scammed her out of $300,000 as she made him famous. “He’s the gentleman standing up in the blue shirt,” Daniels said of Avenatti when she took the stand at 11:10 a.m., telling the jury he once defended her in lawsuits against former President Donald Trump. “I hired a new attorney because he stole from me and lied to me.” Daniels, clad in a maroon cardigan over a black dress with black heels, did not look at Avenatti as she made her way to…