revenuecat-testing-setup: set up a testing environment for RevenueCat purchases Use this skill when the user wants to test purchases against RevenueCat without charging real money. Each store has its own testing channel, and each channel has different fidelity and iteration cost. 1. Detect the platform Inspect the working directory and pick the first match, from top to bottom: 1. React Native : has a entry, or as a dependency → read . If is also a dependency, note it as an Expo project. 2. Flutter : exists at the project root → read . 3. Kotlin Multiplatform : contains a multiplatform source…