Sprocket iOS Post-purchase flow w Added Subscription Prompt

Added a subscription prompt to the post sale creation flow so that every time someone without a subscription posts something the app asks them to subscribe. This can probably be designed better and I needed to ship something quick - open to your thoughts! 😁

If you like it, don't hesitate to click "L" 💗 or "F".

Hi-fi spec showing the logic flows before and after in Figma