"Create a Chipotle-style chicken recipe using the following marinade and cooking method, and include BBQ sauce 2 tbsp in the marinade: 1/2 medium red onion, chopped; 3 cloves garlic; 2 tbsp olive oil; 1 tbsp smoked paprika; 1 tbsp regular chili powder; 1 tsp cumin; 1 tsp oregano; 1 tsp tomato paste; 1-2 tsp apple cider vinegar; 1/4 tsp cayenne optional; 1 tbsp water; 1 tbsp salt; 1/2 tsp black pepper; blend smooth and add water until it reaches 1 cup total marinade. Pour over 3-4 lbs boneless skinless chicken thighs and marinate 1 hour to overnight. Include Instant Pot instructions for two options: tender sliceable chicken (sauté optional, then high pressure 10 minutes, natural release 10 minutes) and shreddable chicken (skip searing, high pressure 12 minutes, natural release 10 minutes). Finish with resting, slicing or shredding, and optional skillet charring for caramelized edges. Use imperial units."