Updated the Messages sent by commercetools Checkout

We have made the following changes to the Messages sent by commercetools Checkout. Messages provide feedback about events during the payment process, helping you inform customers and manage different scenarios that may occur. You can subscribe to Messages using the Checkout Browser SDK.

Changes:

• Added AddDiscountCodeError Message.
• Added RemoveDiscountCodeError Message.
• Added DiscountCodeNotApplicable Message.
• Added ShippingAddressMissingError Message.
• Added ShippingMethodDoesNotMatchCart Message.
• Added InvalidLocale Message.
• Added BadInputData Message.
• Added UpdatedFields Message.
• Replaced InvalidToken Message with ExpiredSession Message.
• Removed ApplicationNotFound and NoPermissionsFound Messages.