README still documents removed --output-mode and incorrect stdout default #1680

Summary

The README currently documents --output-mode and says its default is stdout:
https://github.com/microsoft/playwright-mcp/blob/main/README.md#configuration-file

However, microsoft/playwright#39768 was merged on 2026-03-19 and explicitly removed the outputMode config option. Its summary says non-explicit snapshots go to files, while only explicit browser_snapshot calls are inline:
microsoft/playwright#39768

Observed behavior

With @playwright/mcp 0.0.78 started as follows:

pnpm dlx @playwright/[email protected] --shared-browser-context --port 8931 --output-dir /tmp/playwright-mcp-output

After browser_navigate and browser_click calls, page-.yml and console-.log files are created under the output directory even though no --output-mode is specified.

This behavior matches #39768, but contradicts the README statement that stdout is the default.

Expected documentation

Please remove or update the stale --output-mode entry and document the current artifact behavior. If released CLIs still expose the removed option, please either remove it or make its behavior explicit.