feat: add WebSocket notifications for new comments

- Introduced enriched comment retrieval with user information and like statistics.
- Implemented WebSocket notifications to notify users of new comments on content.
- Updated dependency injection to include `EventsGateway` and `RealtimeModule`.

backend/src/comments/comments.module.ts

@@ -1,5 +1,6 @@
 import { Module } from "@nestjs/common";
 import { AuthModule } from "../auth/auth.module";
+import { RealtimeModule } from "../realtime/realtime.module";
 import { S3Module } from "../s3/s3.module";
 import { CommentsController } from "./comments.controller";
 import { CommentsService } from "./comments.service";
@@ -7,7 +8,7 @@ import { CommentLikesRepository } from "./repositories/comment-likes.repository"
 import { CommentsRepository } from "./repositories/comments.repository";
 
 @Module({
-	imports: [AuthModule, S3Module],
+	imports: [AuthModule, S3Module, RealtimeModule],
 	controllers: [CommentsController],
 	providers: [CommentsService, CommentsRepository, CommentLikesRepository],
 	exports: [CommentsService],