feat: add FunctionsEmptyState component

PatternFly 6 empty state with "No functions found" heading
and a "Create function" link to /functions/create.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: twoGiants

src/components/EmptyState.test.tsx

@@ -0,0 +1,36 @@
+import { render, screen } from '@testing-library/react';
+import { MemoryRouter } from 'react-router-dom';
+import { FunctionsEmptyState } from './EmptyState';
+
+jest.mock('react-i18next', () => ({
+  useTranslation: () => ({ t: (key: string) => key }),
+}));
+
+afterEach(() => {
+  jest.restoreAllMocks();
+});
+
+describe('FunctionsEmptyState', () => {
+  it('renders a heading with "No functions found"', () => {
+    render(
+      <MemoryRouter>
+        <FunctionsEmptyState />
+      </MemoryRouter>,
+    );
+
+    expect(
+      screen.getByRole('heading', { name: 'No functions found' }),
+    ).toBeInTheDocument();
+  });
+
+  it('renders a "Create function" link pointing to /functions/create', () => {
+    render(
+      <MemoryRouter>
+        <FunctionsEmptyState />
+      </MemoryRouter>,
+    );
+
+    const link = screen.getByRole('link', { name: 'Create function' });
+    expect(link).toHaveAttribute('href', '/functions/create');
+  });
+});

src/components/EmptyState.tsx

@@ -0,0 +1,26 @@
+import {
+  EmptyState,
+  EmptyStateActions,
+  EmptyStateBody,
+  EmptyStateFooter,
+} from '@patternfly/react-core';
+import { CubesIcon } from '@patternfly/react-icons';
+import { useTranslation } from 'react-i18next';
+import { Link } from 'react-router-dom';
+
+export function FunctionsEmptyState() {
+  const { t } = useTranslation('plugin__console-functions-plugin');
+
+  return (
+    <EmptyState headingLevel="h2" icon={CubesIcon} titleText={t('No functions found')}>
+      <EmptyStateBody>
+        {t('Create a serverless function to get started.')}
+      </EmptyStateBody>
+      <EmptyStateFooter>
+        <EmptyStateActions>
+          <Link to="/functions/create">{t('Create function')}</Link>
+        </EmptyStateActions>
+      </EmptyStateFooter>
+    </EmptyState>
+  );
+}