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/realtime/realtime.module.ts

@@ -0,0 +1,10 @@
+import { Module } from "@nestjs/common";
+import { CryptoModule } from "../crypto/crypto.module";
+import { EventsGateway } from "./events.gateway";
+
+@Module({
+	imports: [CryptoModule],
+	providers: [EventsGateway],
+	exports: [EventsGateway],
+})
+export class RealtimeModule {}