test(playwright): convert and create new dataset list playwright tests (#36196)

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/bashlib.sh

@@ -117,6 +117,19 @@ testdata() {
   say "::endgroup::"
 }
 
+playwright_testdata() {
+  cd "$GITHUB_WORKSPACE"
+  say "::group::Load all examples for Playwright tests"
+  # must specify PYTHONPATH to make `tests.superset_test_config` importable
+  export PYTHONPATH="$GITHUB_WORKSPACE"
+  pip install -e .
+  superset db upgrade
+  superset load_test_users
+  superset load_examples
+  superset init
+  say "::endgroup::"
+}
+
 celery-worker() {
   cd "$GITHUB_WORKSPACE"
   say "::group::Start Celery worker"