Apple TV design lead Jen Folse is leaving Apple to head to social broadcasting startup Caffeine, where she will serve as VP of Product, 9to5Mac reports. Folse is likely best known to Apple keynote watchers as the face of Apple TV, having taken the stage in several recent Apple events to demo tvOS and related features such as Apple’s new TV app. While the news has been circulating for a few weeks that Folse planned to follow other ex-Apple team…