refac: password and code hashing & checking go through a domain hasher interface used by the use cases instead of bcrypt in the user repository and the auth handler

internal/domain/user/userDomain.go

@@ -6,6 +6,7 @@ import (
 )
 
 var ErrUserNotFound = errors.New("user not found")
+var ErrInvalidCredentials = errors.New("invalid credentials")
 
 type User struct {
 	ID                     uint32    `json:"id"`