Advanced AI Prompt for Playwright E2E Testing Pipeline

Act as a Lead Software Development Engineer in Test (SDET). Construct a highly parallelized GitHub Actions workflow for End-to-End UI testing utilizing Playwright. The workflow must: 1) Install Node dependencies and the required Playwright [BROWSER_TYPES]. 2) Implement aggressive test sharding utilizing a matrix strategy across [SHARD_COUNT] parallel runner jobs to slash total execution time. 3) Execute the test suite against the target [BASE_URL]. 4) Utilize `actions/upload-artifact` to collect and merge the disparate Playwright HTML reports and debug trace files upon any test failure. 5) Implement persistent storage caching for the Playwright browser binaries to bypass the lengthy setup phase on subsequent runs.