Change how Free Shipping is handle with 3rd Party shipping apps

Fixed duplicate "Free Shipping" options at checkout and ensured third-party apps can offer their own discounted shipping rates. Also added admin-configurable ordering of shipping methods.

This includes:

• Fixed duplicate Free Shipping options at checkout

• Third-party delivery apps can offer their own free/discounted rates

• Admin-configurable ordering of shipping methods

How it benefits the Merchant

Gives merchants using third-party shipping apps accurate control over shipping offers and their display order, reducing checkout confusion.

Potential FAQs

Q: Do I need to reconfigure my shipping apps?

A: Check with your account manager for store-specific configuration details.

Q: Can I choose the order shipping methods appear in?

A: Yes, admin-configurable ordering of shipping methods was added, similar to payment methods.