test(accordion): migrate tests to Playwright

core/src/components/accordion/test/a11y/accordion.e2e.ts

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+import { expect } from '@playwright/test';
+import { test } from '@utils/test/playwright';
+
+test.describe('accordion: a11y', () => {
+  test('accordions should be keyboard navigable', async ({ page, browserName }) => {
+    // TODO(FW-1764): remove skip once issue is resolved
+    test.skip(browserName === 'firefox', 'https://github.com/ionic-team/ionic-framework/issues/25529');
+
+    await page.goto(`/src/components/accordion/test/a11y`);
+    const tabKey = browserName === 'webkit' ? 'Alt+Tab' : 'Tab';
+
+    const personalInfoHeader = page.locator('ion-accordion:first-child > ion-item');
+    const billingAddressHeader = page.locator('ion-accordion:nth-child(2) > ion-item');
+    const shippingAddressHeader = page.locator('ion-accordion:nth-child(3) > ion-item');
+    const addressInput = page.locator('#address1 input');
+
+    await page.keyboard.press(tabKey);
+    await expect(personalInfoHeader).toBeFocused();
+
+    await page.keyboard.press('ArrowDown');
+    await expect(billingAddressHeader).toBeFocused();
+
+    await page.keyboard.press('ArrowDown');
+    await expect(shippingAddressHeader).toBeFocused();
+
+    await page.keyboard.press('ArrowDown');
+    await expect(personalInfoHeader).toBeFocused();
+
+    await page.keyboard.press('ArrowUp');
+    await expect(shippingAddressHeader).toBeFocused();
+
+    // open Shipping Address accordion and move focus to the input inside it
+    await page.keyboard.press('Enter');
+    await page.waitForChanges();
+    await page.keyboard.press(tabKey);
+    await expect(addressInput).toBeFocused();
+
+    // ensure keyboard interaction doesn't move focus from body
+    await page.keyboard.press('ArrowDown');
+    await expect(addressInput).toBeFocused();
+  });
+});

core/src/components/accordion/test/basic/accordion.e2e.ts

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+import { expect } from '@playwright/test';
+import { test } from '@utils/test/playwright';
+
+test.describe('accordion: basic', () => {
+  test('should not have visual regressions', async ({ page }) => {
+    await page.goto(`/src/components/accordion/test/basic`);
+
+    await page.setIonViewport();
+
+    expect(await page.screenshot()).toMatchSnapshot(`accordion-basic-${page.getSnapshotSettings()}.png`);
+  });
+});