[TASK] Create customer setup helpers - Prerequisites and Test Data Setup

[africanitem]

Task Details

Epic: #491 [EPIC] Prerequisites and Test Data Setup Workflow E2E Tests

Dependencies

• Depends on: [TASK] Create test user setup helpers - Prerequisites and Test Data Setup #493

Success Criteria

• Helper functions in e2e/helpers/customer-helpers.ts
• createTestCustomer() function using pattern: Test Customer ${Date.now()}
• Email pattern: customer-${Date.now()}@example.com
• Functions create customers with proper billing/shipping addresses
• Functions use standardized contact creation patterns