IAV-590/Rename clientSav to customerCare and add WooCommerce/Freshdesk credential types

Summary

This MR includes naming improvements and new credential types for e-commerce and support integrations.

Changes

Refactoring

• Renamed clientSavUrl → customerCareUrl in N8NConstants
• Renamed clientSavApiKey → customerCareApiKey in N8NConstants

New Features

• Added WOOCOMMERCE credential type in CredentialType enum
• Added FRESHDESK credential type in CredentialType enum

Closes IAV-590