Starting with the marinade for the shrimp, combine the olive oil, lime zest, lime juice, honey, cilantro, and salt in a large bowl. Whisk everything together and taste for seasoning. Add more salt, lime juice, or honey if necessary. Toss in the shrimp, cover with plastic wrap, and let it marinate in the fridge for 15-20 minutes while you work on the mango slaw.