feat: more role backend and admin/writer roles additions and adjustments

internal/domain/role/roleDomain.go

@@ -11,6 +11,8 @@ var (
 	ErrRoleConflict      = errors.New("role was modified concurrently")
 	ErrInvalidScope      = errors.New("invalid scope for permission")
 	ErrOwnerOnlyGrant    = errors.New("owner-only permission granted to a non-owner role")
+
+	ErrMissingPermission = errors.New("missing permission")
 )
 
 type Scope string