refac: remove frontend & clearer DDD

internal/domain/user/repository.go

@@ -0,0 +1,13 @@
+package user
+
+type Repository interface {
+	Get(id uint32) (User, error)
+	GetByUsername(username string) (User, error)
+	GetByEmail(email string) (User, error)
+	GetAll() []User
+	Create(user User) (User, error)
+	Delete(id uint32) error
+	UpdateVerificationStatus(userId uint32, isVerified bool) (User, error)
+	UpdatePassword(userId uint32, password string) (User, error)
+	UpdatePasswordResetCode(userId uint32, code string) (User, error)
+}