feat: Implement comprehensive i18n in CustomerOrderWizard
- Add useTranslation hook to all three wizard step components - Translate CustomerSelectionStep: customer search, selection, and new customer form - Translate OrderItemsStep: product selection, order items management - Translate DeliveryPaymentStep: delivery, payment, and all advanced options sections - Update wizard step titles to use translation keys - Support for English, Spanish, and Basque languages
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