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/controllers/instance.controller.ts

@@ -170,6 +170,9 @@ export class InstanceController {
           rabbitmq: {
             enabled: instanceData?.rabbitmq?.enabled,
           },
+          nats: {
+            enabled: instanceData?.nats?.enabled,
+          },
           sqs: {
             enabled: instanceData?.sqs?.enabled,
           },
@@ -258,6 +261,9 @@ export class InstanceController {
         rabbitmq: {
           enabled: instanceData?.rabbitmq?.enabled,
         },
+        nats: {
+          enabled: instanceData?.nats?.enabled,
+        },
         sqs: {
           enabled: instanceData?.sqs?.enabled,
         },