Add professional studio lighting — AI Lighting filter

Magazine-quality studio light, summoned onto a photo taken nowhere near a studio. This filter applies the polished, multi-light look of professional portraiture — controlled key, gentle fill, clean catchlights — without prescribing a specific classical setup. It's the generalist's version of the Studio category: one tap toward 'professionally lit', letting the specialized filters (Rembrandt, butterfly, low-key) handle the connoisseur cases.