Install and cache Playwright browsers in CI

Author: simonw

.github/workflows/test.yml

@@ -23,6 +23,17 @@ jobs:
     - name: Install dependencies
       run: |
         pip install -e . --group dev
+    - name: Cache Playwright browsers
+      uses: actions/cache@v5
+      with:
+        path: |
+          ~/.cache/ms-playwright/
+          ~/Library/Caches/ms-playwright/
+          ~\AppData\Local\ms-playwright\
+        key: ${{ runner.os }}-playwright
+    - name: Install Playwright browsers
+      run: |
+        python -m playwright install chromium
     - name: Run tests
       env:
         PYTHONUTF8: "1"