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/recommendation.routes.js

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+const r=require("express").Router(),c=require("../controllers/recommendation.controller"),{authenticate}=require("../middleware/auth.middleware"),validate=require("../middleware/validate.middleware"),s=require("../validation/supportRecommendation.schemas"),{sensitiveLimiter}=require("../middleware/rateLimit.middleware");r.post("/recommendations/events",authenticate,sensitiveLimiter,validate(s.viewEvent),c.event);r.get("/products/:productId/recommendations/related",c.related);r.get("/recommendations/trending",c.trending);r.get("/recommendations/popular",c.popular);r.get("/recommendations/recently-viewed",authenticate,c.recent);r.get("/recommendations/for-you",authenticate,c.forYou);module.exports=r;