docs: Create vTiger & Simply-CRM integration setup guide with credential requirements
feat: Implement ticket system enhancements including relations, calendar events, templates, and AI suggestions
refactor: Update ticket system migration to include audit logging and enhanced email metadata
- Added migration 025 for the Ticket System, creating tables for tickets, comments, attachments, worklogs, prepaid cards, and audit logs.
- Introduced migration 026 to add ticket-related permissions to the auth system and assign them to user groups.
- Developed a test suite for the Ticket Module, validating database schema, ticket number generation, prepaid card constraints, service logic, worklog creation, audit logging, and views.
