[CC-2977] Map payment create state

[Ryouzanpaku]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for mapping the CREATE payment state in the Unzer payment SDK. The changes enable proper handling of payments in the "create" state, which occurs when a payment is initiated but not yet completed (e.g., through Paypage).

Key Changes:

• Added CREATE state to the BasePayment.State enum
• Updated state mapping logic to support the new state value (ID 6)
• Added test coverage to verify correct mapping of the CREATE state

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/main/java/com/unzer/payment/BasePayment.java	Added CREATE state to the State enum
src/main/java/com/unzer/payment/communication/mapper/ApiToSdkConverter.java	Updated state ID range validation and organized imports
src/test/java/com/unzer/payment/business/PaymentTest.java	Added test to verify CREATE state mapping for Paypage payments

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[sixer1182]

please check my comment