feat: implement support chat functionality with new module, service, controller, DTOs, and schema updates.

src/app.module.ts

@@ -19,6 +19,7 @@ import { MessagesModule } from './messages';
 import { CmsModule } from './cms';
 import { NotificationsModule } from './notifications';
 import { TestimonialsModule } from './testimonials';
+import { SupportChatModule } from './support-chat';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
 
@@ -61,6 +62,7 @@ import { AppService } from './app.service';
     CmsModule,
     NotificationsModule,
     TestimonialsModule,
+    SupportChatModule,
   ],
   controllers: [AppController],
   providers: [