feat: Implement create folder API endpoint

packages/backend/src/serializers/folder.test.js

@@ -0,0 +1,22 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { createFolder } from '../../test/factories/folder';
+import folderSerializer from './folder';
+
+describe('folder serializer', () => {
+  let folder;
+
+  beforeEach(async () => {
+    folder = await createFolder();
+  });
+
+  it('should return folder data', async () => {
+    const expectedPayload = {
+      id: folder.id,
+      name: folder.name,
+      createdAt: folder.createdAt.getTime(),
+      updatedAt: folder.updatedAt.getTime(),
+    };
+
+    expect(folderSerializer(folder)).toStrictEqual(expectedPayload);
+  });
+});