Add E2E test infrastructure for rook plugin

- playwright.config.ts with authenticated test projects
- e2e/auth.setup.ts authenticates via OIDC or token
- e2e/rook.spec.ts smoke tests for sidebar, overview page,
  storage classes navigation, and plugin settings
- scripts/deploy-e2e-headlamp.sh deploys Headlamp + rook in headlamp-dev
- scripts/teardown-e2e-headlamp.sh cleans up after tests
- e2e.yaml uses reusable workflow from .github repo
- @playwright/test ^1.58.2 devDep added

- PRI-640

Co-Authored-By: Paperclip <noreply@paperclip.ing>

e2e/rook.spec.ts

@@ -0,0 +1,54 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('Rook plugin smoke tests', () => {
+  test('sidebar contains Rook entry', async ({ page }) => {
+    await page.goto('/');
+    const sidebar = page.getByRole('navigation', { name: 'Navigation' });
+    await expect(sidebar).toBeVisible({ timeout: 15_000 });
+    await expect(sidebar.getByRole('button', { name: /rook/i })).toBeVisible();
+  });
+
+  test('Rook sidebar entry navigates to overview', async ({ page }) => {
+    await page.goto('/');
+    const sidebar = page.getByRole('navigation', { name: 'Navigation' });
+    await expect(sidebar).toBeVisible({ timeout: 15_000 });
+
+    const rookEntry = sidebar.getByRole('button', { name: /rook/i });
+    await expect(rookEntry).toBeVisible();
+    await rookEntry.click();
+
+    await expect(page).toHaveURL(/\/rook-ceph/);
+    await expect(page.getByRole('heading', { name: /overview/i })).toBeVisible();
+  });
+
+  test('overview page renders content', async ({ page }) => {
+    await page.goto('/c/main/rook-ceph');
+
+    await expect(page.getByRole('heading', { name: /overview/i })).toBeVisible({
+      timeout: 15_000,
+    });
+
+    const hasContent = await page.locator('text=/cluster|ceph|status/i').first().isVisible().catch(() => false);
+    const hasDashboard = await page.locator('[class*="Mui"]').first().isVisible().catch(() => false);
+    expect(hasContent || hasDashboard).toBe(true);
+  });
+
+  test('navigation to storage classes view works', async ({ page }) => {
+    await page.goto('/c/main/rook-ceph');
+
+    const sidebar = page.getByRole('navigation', { name: 'Navigation' });
+    const storageClassesLink = sidebar.getByRole('link', { name: /storage classes/i });
+    await expect(storageClassesLink).toBeVisible({ timeout: 10_000 });
+    await storageClassesLink.click();
+
+    await expect(page).toHaveURL(/\/rook-ceph\/storage-classes/);
+    await expect(page.getByRole('heading', { name: /storage class/i })).toBeVisible({ timeout: 15_000 });
+  });
+
+  test('plugin settings page shows rook plugin entry', async ({ page }) => {
+    await page.goto('/settings/plugins');
+
+    const pluginEntry = page.locator('text=rook').first();
+    await expect(pluginEntry).toBeVisible({ timeout: 30_000 });
+  });
+});