[TASK] Create supplier 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/supplier-helpers.ts
• createTestSupplier() function using pattern: Test Supplier ${Date.now()}
• Email pattern: supplier-${Date.now()}@example.com
• Functions create suppliers with proper billing/shipping addresses