🚚(app-desk) create addMembers feature

All the code related to adding members has been moved
to the addMembers feature.

src/frontend/apps/e2e/__tests__/app-desk/member-create.spec.ts

@@ -16,7 +16,7 @@ test.describe('Members Create', () => {
 
     await page.getByLabel('Add members to the team').click();
 
-    await expect(page.getByText('Add members to the team')).toBeVisible();
+    await expect(page.getByText('Add a member')).toBeVisible();
     await expect(
       page.getByLabel(/Find a member to add to the team/),
     ).toBeVisible();