feat: implement messaging functionality with real-time updates

- Introduced a messaging module on the backend using NestJS, including repository, service, controller, DTOs, and WebSocket Gateway.
- Developed a frontend messaging page with conversation management, real-time message handling, and chat UI.
- Implemented `MessageService` for API integrations and `SocketProvider` for real-time WebSocket updates.
- Enhanced database schema to support conversations, participants, and messages with Drizzle ORM.

backend/src/messages/messages.module.ts

@@ -0,0 +1,14 @@
+import { Module } from "@nestjs/common";
+import { AuthModule } from "../auth/auth.module";
+import { RealtimeModule } from "../realtime/realtime.module";
+import { MessagesController } from "./messages.controller";
+import { MessagesService } from "./messages.service";
+import { MessagesRepository } from "./repositories/messages.repository";
+
+@Module({
+	imports: [AuthModule, RealtimeModule],
+	controllers: [MessagesController],
+	providers: [MessagesService, MessagesRepository],
+	exports: [MessagesService],
+})
+export class MessagesModule {}