Mollie doesn't allow orders with €0

[martijnvdbrug]

Describe the bug
When the order total is €0, Mollie returns an error Amount is lower than the minimum, but it should transition to PaymentSettled. This can happen when a customers uses a gift card for example

To Reproduce
Steps to reproduce the behavior:

1. Create a promotion that discounts €10 on every order
2. Add an item to cart resulting in the order total being €0 after the discount is applied
3. call createMolliePaymentIntent
4. See error

Expected behavior
The Mollie plugin should return the configured thank-you or order-confirmation url, and the order should have transitioned to PaymentSettled

Environment (please complete the following information):

• @vendure/core version: 2.2
• Nodejs version 20
• Database (mysql/postgres etc): MySQL

Additional context
I can pick this up :-)