feat: add i18n support for scaffolder-react plugin

Signed-off-by: JounQin <admin@1stg.me>

packages/cli/templates/frontend-plugin/src/components/ExampleFetchComponent/ExampleFetchComponent.test.tsx.hbs

@@ -1,19 +1,20 @@
 import React from 'react';
-import { render, screen } from '@testing-library/react';
+import { renderInTestApp } from '@backstage/test-utils';
 import { ExampleFetchComponent } from './ExampleFetchComponent';
 
 describe('ExampleFetchComponent', () => {
   it('renders the user table', async () => {
-    render(<ExampleFetchComponent />);
+    const { getAllByText, getByAltText, getByText, findByRole } =
+      await renderInTestApp(<ExampleFetchComponent />);
 
     // Wait for the table to render
-    const table = await screen.findByRole('table');
-    const nationality = screen.getAllByText('GB');
+    const table = await findByRole('table');
+    const nationality = getAllByText('GB');
     // Assert that the table contains the expected user data
     expect(table).toBeInTheDocument();
-    expect(screen.getByAltText('Carolyn')).toBeInTheDocument();
-    expect(screen.getByText('Carolyn Moore')).toBeInTheDocument();
-    expect(screen.getByText('carolyn.moore@example.com')).toBeInTheDocument();
+    expect(getByAltText('Carolyn')).toBeInTheDocument();
+    expect(getByText('Carolyn Moore')).toBeInTheDocument();
+    expect(getByText('carolyn.moore@example.com')).toBeInTheDocument();
     expect(nationality[0]).toBeInTheDocument();
   });
 });