fix: update Playwright to 1.56.1 to resolve security vulnerability (#89)

Updated Playwright from 1.54.1 to 1.56.1 to address moderate severity
vulnerability GHSA-7mvr-c777-76hp where Playwright downloads and installs
browsers without verifying the authenticity of the SSL certificate.

Ran npm audit fix to apply the update. All tests and linting pass.

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: jamesbhobbs