Caramelized Cabbage and Noodles with Lemon and Herbs

Name: Caramelized Cabbage and Noodles with Lemon and Herbs
Ingredients: 1/4 cup unsalted butter; 1 large onion, thinly sliced; 1 tablespoon kosher salt, divided; 1 small head green cabbage, quartered, cored, and very thinly sliced; 1 teaspoon brown sugar; 1 teaspoon onion powder; 1 teaspoon sweet paprika; 1/4 teaspoon crushed red pepper (optional); 1/2 teaspoon freshly ground black pepper, divided; 12 ounces uncooked wide egg noodles; 3/4 cup chopped mixed fresh herbs, such as dill, parsley, and chives, plus more for garnish; 2 tablespoons olive oil; 1 teaspoon finely grated lemon zest plus 1 tablespoon fresh lemon juice; Crème fraîche, for serving (optional)