ci: add E2E test job using workos emulator

Runs Playwright E2E tests against the Next.js example app with
the WorkOS emulator on every push/PR. Uploads test results as
artifacts on failure.

Author: nicknisi

.github/workflows/ci.yml

@@ -42,3 +42,34 @@ jobs:
 
       - name: Test
         run: pnpm run test
+
+  e2e:
+    name: E2E Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 22
+          cache: 'pnpm'
+
+      - name: Install Dependencies
+        run: pnpm install
+
+      - name: Install Playwright Browsers
+        run: pnpm --filter e2e-tests exec playwright install chromium
+
+      - name: Build Library
+        run: pnpm run build
+
+      - name: Run E2E Tests
+        run: pnpm run test:e2e:next
+
+      - name: Upload Test Results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: e2e-test-results
+          path: e2e/test-results/
+          retention-days: 7