Support for third-party checkout integrations (GoKwik, Shiprocket)

We want to move our store to a third-party checkout solution like GoKwik or Shiprocket, but Zenbox Bundle Builder doesn’t currently support integrations with these. Having this feature would allow us to keep using bundles while switching to our preferred checkout provider.

This feature is important because without it, we can’t use Zenbox Bundle Builder if we move away from Shopify Checkout. Adding support would let us continue offering bundles and discounts seamlessly.