feat: Add NATS integration support to the event system

- Added NATS package to dependencies
- Created Prisma schema models for NATS configuration
- Implemented NATS controller, router, and event management
- Updated instance controller and event manager to support NATS
- Added NATS configuration options in environment configuration
- Included NATS events in instance validation schema

src/api/integrations/event/event.router.ts

@@ -1,3 +1,4 @@
+import { NatsRouter } from '@api/integrations/event/nats/nats.router';
 import { PusherRouter } from '@api/integrations/event/pusher/pusher.router';
 import { RabbitmqRouter } from '@api/integrations/event/rabbitmq/rabbitmq.router';
 import { SqsRouter } from '@api/integrations/event/sqs/sqs.router';
@@ -14,6 +15,7 @@ export class EventRouter {
     this.router.use('/webhook', new WebhookRouter(configService, ...guards).router);
     this.router.use('/websocket', new WebsocketRouter(...guards).router);
     this.router.use('/rabbitmq', new RabbitmqRouter(...guards).router);
+    this.router.use('/nats', new NatsRouter(...guards).router);
     this.router.use('/pusher', new PusherRouter(...guards).router);
     this.router.use('/sqs', new SqsRouter(...guards).router);
   }