Feature Request: extension mode support

[broven]

I would like the Playwright CLI to support an Extension Mode, allowing it to connect to an existing browser instance
via the Playwright MCP Bridge extension, rather than launching a new browser process. This is very useful for browser automated tasks

This feature is already partially conceptually implemented in playwright-mcp (refer to
https://github.com/microsoft/playwright-mcp/blob/main/packages/extension/README.md), and it would be great to expose
this capability directly through the CLI.

Reference

• Extension Documentation: https://github.com/microsoft/playwright-mcp/blob/main/packages/extension/README.md
• Current State: There seems to be some logic already in program.ts handling connect-to-extension, but it needs to be
  formalized in the command definitions and help generation to be fully supported and discoverable.