[Feat] Remote Playwright Instances

[mschfh]

Problem Description
Firecrawl lacks support for connecting to remote playwright instances via CDP.

Proposed Feature
Implement support for remote Playwright connections over CDP (Chrome DevTools Protocol) to external browser instances.

Implementation Suggestions

• add an env var to configure a CDP endpoint
• use the CDP endpoint instead of launching a local browser

Use Case

• Use Bright Data scraping browser or Zenrows to circumvent captchas, bot detection and other restrictions.

Additional Context

• Bright Data's scraping browser: https://docs.brightdata.com/scraping-automation/scraping-browser/code-examples
• Zenrows scraping browser: https://www.zenrows.com/solutions/scraping-browser
• Playwright's connect_over_cdp: https://playwright.dev/python/docs/api/class-browsertype#browser-type-connect-over-cdp

[mschfh]

@nickscamara Would you accept a PR for playwright-service that uses playwright.chromium.connect_over_cdp() instead of playwright.chromium.launch() if REMOTE_CDP_URL is configured?