Fix ERR_PACKAGE_PATH_NOT_EXPORTED on Playwright 1.60.0

[DenysKuchma]

Summary

• playwright-core/lib/utils is no longer exported in Playwright 1.60.0's
  package.json "exports" map, breaking explorbot init with
  ERR_PACKAGE_PATH_NOT_EXPORTED
• Replaced the static ESM import with a lazy require() via
  createRequire inside getAsLocator(), so the module is only loaded when
  renderCall() is actually called (Playwright code generation), not at
  startup

#40