Add Playwright test suite for Kodra website

- Add package.json with Playwright, axe-core, and serve dependencies
- Add playwright.config.js with 7 browser projects (chromium, edge, webkit, firefox, mobile-chrome, mobile-safari, ipad)
- Add browser-compatibility.spec.js: scroll, CSS validation, footer rendering, Safari compat, mobile touch targets, navigation, responsive layout, link validation, image loading, terminal component (40 tests)
- Add world-class-audit.spec.js: WCAG 2.1 AA accessibility, Core Web Vitals performance, SEO/meta/JSON-LD, security, visual regression screenshots, Kodra content validation (35 tests)
- Add .github/workflows/website-tests.yml for CI on website file changes
- Update .gitignore with playwright-report/ and playwright/.cache/

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: kevinevans1

.github/workflows/website-tests.yml

@@ -0,0 +1,39 @@
+name: Website Tests
+
+on:
+  push:
+    branches: [main]
+    paths: ['index.html', '404.html', 'assets/**', 'tests/website/**', 'playwright.config.js', 'package.json']
+  pull_request:
+    branches: [main]
+    paths: ['index.html', '404.html', 'assets/**', 'tests/website/**', 'playwright.config.js', 'package.json']
+
+concurrency:
+  group: website-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Playwright Tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - run: npm ci
+      - run: npx playwright install --with-deps
+      - run: npx playwright test
+      - uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 7
+      - uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: test-results
+          path: test-results/
+          retention-days: 7

.gitignore

@@ -40,3 +40,5 @@ tests/lib/bats-assert/
 test-results/
 node_modules/
 ci-reports/
+playwright-report/
+playwright/.cache/