feat: 添加角色类型常量及用户主角色获取方法

internal/ent/role/role.go

@@ -52,7 +52,7 @@ func ValidColumn(column string) bool {
 
 var (
 	// CodeValidator is a validator for the "code" field. It is called by the builders before save.
-	CodeValidator func(string) error
+	CodeValidator func(int) error
 	// NameValidator is a validator for the "name" field. It is called by the builders before save.
 	NameValidator func(string) error
 )