Activate: Improve sharing experience

[itsmeichigo]

This task aims to improve the sharing experience for new merchants so that they can start selling and getting their first orders.

• Add a local store onboarding task #9792 (Dropped this task as we decided to not add a local store onboarding task)
• Celebratory screen after creating the first product Add product: Show celebratory view when the first product is created #9790
• Show the share CTA in product form #9788
• Swipe-to-share a product Product list: Add share-to-swipe gesture  #9799
• Share store Dashboard: Add button to share store #9796
• Show "Share product" option only if the store is public #9817
• AI-generated share content Activate: Add AI support for sharing product messages #9867
• A/B experiments (dropped this since it's related to Add a local store onboarding task #9792
• Analytics

Internal reference: pe5sF9-1xq-p2.