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.

prisma/postgresql-schema.prisma

@@ -88,6 +88,7 @@ model Instance {
   Rabbitmq                Rabbitmq?
   Nats                    Nats?
   Sqs                     Sqs?
+  Kafka                   Kafka?
   Websocket               Websocket?
   Typebot                 Typebot[]
   Session                 Session?
@@ -312,6 +313,16 @@ model Sqs {
   instanceId String    @unique
 }
 
+model Kafka {
+  id         String    @id @default(cuid())
+  enabled    Boolean   @default(false) @db.Boolean
+  events     Json      @db.JsonB
+  createdAt  DateTime? @default(now()) @db.Timestamp
+  updatedAt  DateTime  @updatedAt @db.Timestamp
+  Instance   Instance  @relation(fields: [instanceId], references: [id], onDelete: Cascade)
+  instanceId String    @unique
+}
+
 model Websocket {
   id         String    @id @default(cuid())
   enabled    Boolean   @default(false) @db.Boolean