large shrimp, peeled and deveined • extra-virgin olive oil, divided • zest + 2 tablespoons juice lemon zest, plus lemon juice (from 1 lemon) • red-pepper flakes • Kosher salt (such as Diamond Crystal) and black pepper • garlic cloves, minced • unsalted butter • orzo • dry white wine • boiling water, seafood stock or chicken stock • finely chopped parsley