Maia Hirsch’s affinity for fashion design doesn’t  STEM  from a lifelong love of luxe labels like Chanel, Hermès and Dior.    While admittedly an appreciator of haute finery, Hirsch, 24, a mechanical engineer from upstate Ithaca, is more fascinated with scientific systems and robotics than imported silks and lambskin leather.  But when the pandemic erupted in 2020, leaving the then-undergrad stranded while studying in Florida, she enrolled in a fashion design course at the Istituto Marangoni