feat(accessibility): enhance AccountViewView and document test suite

- Add ARIA annotations and roles to AccountViewView for better screen reader support
  - Add role="tooltip" to API server description
  - Improve input control accessibility with proper ARIA attributes
  - Add descriptive labels and aria-labels for interactive elements

- Create comprehensive README.md for Playwright test suite
  - Document test structure and organization
  - Add setup instructions and prerequisites
  - Include troubleshooting guide and contribution guidelines
  - Link to related documentation

This change improves accessibility compliance and makes the test suite
more maintainable for contributors.

test-playwright/00-noid-tests.spec.ts

@@ -179,7 +179,7 @@ test('Confirm test API setting (may fail if you are running your own Time Safari
   const endorserTermInConfig = endorserTerm?.substring(ENDORSER_ENV_NAME.length + 1);
 
   const endorserServer = endorserTermInConfig || 'https://test-api.endorser.ch';
-  await expect(page.getByRole('textbox').nth(1)).toHaveValue(endorserServer);
+  await expect(page.locator('#apiServerInput')).toHaveValue(endorserServer);
 });
 
 test('Check User 0 can register a random person', async ({ page }) => {