IN this age of temptation and MTV, less is more. For girls, that is. With more than a dash of derring-do, an increasing number is casting off the salwar kameez for short skirts, minis, micro-minis, shorts--this season, hot pants are hot--and crop tops. According to fashion designer Manoviraj Khosla, "minis are a fashion thing. For the moment, they are up because people are more body-conscious and want to show as much as possible."