feat(kafka): add Kafka integration for event streaming

- Introduced Kafka support in the Evolution API, allowing for real-time event streaming and processing.
- Updated environment configuration to include Kafka-related variables.
- Added KafkaController and KafkaRouter for managing Kafka events.
- Enhanced event management to support Kafka alongside existing integrations.
- Updated database schemas and migrations for Kafka integration in both MySQL and PostgreSQL.
- Documented Kafka integration in the README file.

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

@@ -0,0 +1,36 @@
+import { RouterBroker } from '@api/abstract/abstract.router';
+import { InstanceDto } from '@api/dto/instance.dto';
+import { EventDto } from '@api/integrations/event/event.dto';
+import { HttpStatus } from '@api/routes/index.router';
+import { eventManager } from '@api/server.module';
+import { eventSchema, instanceSchema } from '@validate/validate.schema';
+import { RequestHandler, Router } from 'express';
+
+export class KafkaRouter extends RouterBroker {
+  constructor(...guards: RequestHandler[]) {
+    super();
+    this.router
+      .post(this.routerPath('set'), ...guards, async (req, res) => {
+        const response = await this.dataValidate<EventDto>({
+          request: req,
+          schema: eventSchema,
+          ClassRef: EventDto,
+          execute: (instance, data) => eventManager.kafka.set(instance.instanceName, data),
+        });
+
+        res.status(HttpStatus.CREATED).json(response);
+      })
+      .get(this.routerPath('find'), ...guards, async (req, res) => {
+        const response = await this.dataValidate<InstanceDto>({
+          request: req,
+          schema: instanceSchema,
+          ClassRef: InstanceDto,
+          execute: (instance) => eventManager.kafka.get(instance.instanceName),
+        });
+
+        res.status(HttpStatus.OK).json(response);
+      });
+  }
+
+  public readonly router: Router = Router();
+}