feat: Users API, ownership transfer and removal of the legacy role string

internal/domain/user/userRepositoryInterface.go

@@ -16,4 +16,6 @@ type Repository interface {
 	ClearVerificationCode(userId uint32) (User, error)
 	ResetPassword(userId uint32, hashedPassword string) (User, error)
 	UpdateDisplayName(userId uint32, displayName string) (User, error)
+	UpdateRole(id uint32, from uint32, to uint32) (User, error)
+	TransferOwnership(from uint32, to uint32, ownerRoleID uint32, formerRoleID uint32) error
 }