feat: Update project structure and configuration files

backend/app/events/publishers/user_register.go

@@ -0,0 +1,22 @@
+package publishers
+
+import (
+	"encoding/json"
+
+	"go.ipao.vip/atom/contracts"
+	"quyun/app/events"
+)
+
+var _ contracts.EventPublisher = (*UserRegister)(nil)
+
+type UserRegister struct {
+	ID int64 `json:"id"`
+}
+
+func (e *UserRegister) Marshal() ([]byte, error) {
+	return json.Marshal(e)
+}
+
+func (e *UserRegister) Topic() string {
+	return events.TopicUserRegister
+}