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/support/customer.routes.js

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+const r=require("express").Router(),c=require("../../controllers/support/customer.controller"),{authenticate}=require("../../middleware/auth.middleware"),validate=require("../../middleware/validate.middleware"),s=require("../../validation/supportRecommendation.schemas"),{sensitiveLimiter}=require("../../middleware/rateLimit.middleware");r.use(authenticate);r.get("/support/tickets",c.list);r.post("/support/tickets",sensitiveLimiter,validate(s.ticketCreate),c.create);r.get("/support/tickets/:id",c.detail);r.post("/support/tickets/:id/messages",sensitiveLimiter,validate(s.message),c.reply);r.post("/support/tickets/:id/close",c.close);r.get("/support/tickets/:id/attachments/:attachmentId",c.attachment);module.exports=r;