feat: Introduce serializers

packages/backend/src/serializers/permission.js

@@ -0,0 +1,13 @@
+const permissionSerializer = (permission) => {
+  return {
+    id: permission.id,
+    roleId: permission.roleId,
+    action: permission.action,
+    subject: permission.subject,
+    conditions: permission.conditions,
+    createdAt: permission.createdAt,
+    updatedAt: permission.updatedAt,
+  };
+};
+
+export default permissionSerializer;