Refactor onboarding UI and logic, add question component

Created by: Berat02xz

Introduced a reusable QuestionOnboarding component for displaying onboarding questions. Updated FitnessGoal and HowDoYouLookRightNow screens to use the new component and improved their layouts. Enhanced ButtonOnboarding to support answer tracking and saving user selections via context. Refined OnboardingTopBar styling and progress bar, updated theme constants, and added Inter-Medium font. Removed the unused TestScreen. Added BodyTest.png asset and integrated @react-native-async-storage/async-storage dependency.