refac: remove frontend & clearer DDD

internal/infrastructure/useCases/SendMail.go

@@ -0,0 +1,15 @@
+package useCases
+
+import "RenewCMS/internal/domain/mail"
+
+type SendMailUseCase struct {
+	mailRepository mail.Repository
+}
+
+func NewSendMailUseCase(mailRepository mail.Repository) *SendMailUseCase {
+	return &SendMailUseCase{mailRepository}
+}
+
+func (g *SendMailUseCase) SendMail(receiverAddress string, templateName string, data any) error {
+	return g.mailRepository.Send(receiverAddress, templateName, data)
+}