Wondering how all of the editors, celebs, and street-style stars are staying warm this New York Fashion Week? Layers, that's how. But not just any kind of layers: We're talking about coats, jackets, sweatshirts, and cozy knits tied around these stylish ladies in ways that—well—these pieces may not exactly have been intended for. In other words? Genius. Taylor Tomasi Hill dressed for the weather by tying a slim puffer around her waist. We've seen a lot of double-jacket styling on the streets…