In her first month of attending Ziva Meditation on 38th Street, the trend forecaster met Noël Rohayem, a clothing designer whom she later helped to find a new job. That led to a partnership, forged last summer, for which the two are creating a made-to-fit clothing line that will be introduced next year. Most weeks, they meet at Ms. Chow’s apartment — starting every business meeting with a short meditation — to go over marketing…