Agents find Playwright through the browser skill

Obeya's browser skill drives Chrome; for checks in WebKit (Safari's engine) or Firefox, agents need Playwright. An agent once searched the whole home folder for it, and macOS asked for access to Music and iCloud Drive. The skill now has a `playwright` command that prints the line to import the Playwright Obeya already ships, from anywhere, and says whether WebKit and Firefox are installed. In the video, a real agent asked to check a Safari bug uses it as its first step and searches nothing.