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/routes/help.routes.js

@@ -0,0 +1 @@
+const r=require("express").Router(),c=require("../controllers/help.controller"),{sensitiveLimiter}=require("../middleware/rateLimit.middleware");r.get("/help/categories",c.categories);r.get("/help/categories/:slug",c.category);r.get("/help/articles",c.articles);r.get("/help/articles/:slug",c.article);r.get("/help/search",sensitiveLimiter,c.search);module.exports=r;