feat: Implement Phase 10 support and recommendations features

- Added models for support messages, SLA policies, tickets, ticket events, and ticket links.
- Created routes for help, help admin, newsletter, recommendations, and support for both customer and admin.
- Developed services for help, marketing (newsletter), and recommendations.
- Introduced support service for ticket management, including creation, replies, transitions, and attachments.
- Added validation schemas for support recommendations and ticket management.
- Implemented a cron job for support reconciliation and recommendation cleanup.
- Created migration for new support and recommendation database tables.
- Added unit tests for validation and policy checks related to Phase 10 features.

app/models/support/supportCategory.model.js

@@ -0,0 +1 @@
+module.exports=(s,D)=>s.define("SupportCategory",{id:{type:D.STRING,primaryKey:true},code:{type:D.STRING(60),allowNull:false,unique:true},status:{type:D.ENUM("ACTIVE","INACTIVE"),allowNull:false,defaultValue:"ACTIVE"},translations:{type:D.JSON,allowNull:false,defaultValue:{}},sort_order:{type:D.INTEGER,allowNull:false,defaultValue:0}},{tableName:"support_categories",timestamps:true});