Initial commit of LittleShop project (excluding large archives)

- BTCPay Server integration
- TeleBot Telegram bot
- Review system
- Admin area
- Docker deployment configuration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Models/Product.cs

@@ -37,4 +37,5 @@ public class Product
     public virtual Category Category { get; set; } = null!;
     public virtual ICollection<ProductPhoto> Photos { get; set; } = new List<ProductPhoto>();
     public virtual ICollection<OrderItem> OrderItems { get; set; } = new List<OrderItem>();
+    public virtual ICollection<Review> Reviews { get; set; } = new List<Review>();
 }