feat: add playwright usage docs

example/playwright/playwright.py

@@ -0,0 +1,25 @@
+"""
+Python 示例：通过 Playwright 连接 Browserless，并抓取页面截图。
+运行前请先在 Baihu 的“语言依赖”中为 Python 安装 playwright 包。
+如果使用 Browserless，请不要执行 `playwright install`。
+"""
+
+from playwright.sync_api import sync_playwright
+
+
+def main() -> None:
+    with sync_playwright() as p:
+        browser = p.chromium.connect_over_cdp(
+            "http://browser:3000?token=your-secret-token"
+        )
+
+        page = browser.new_page()
+        page.goto("https://www.baidu.com", wait_until="networkidle", timeout=30000)
+        page.screenshot(path="baidu.png", full_page=True)
+
+        print("截图已保存为 baidu.png")
+        browser.close()
+
+
+if __name__ == "__main__":
+    main()