Installs Chrome for Testing and the chromium-bidi server's Node deps
into .browsers/, recording the binary path in .browsers/PATHS.
Leaves any existing LIGHTPANDA= entry in PATHS untouched.
Usage
mix wallabidi.install.chrome # latest stable
mix wallabidi.install.chrome 147.0.7727 # specific versionRequirements
Requires npx and npm (Node.js).