feat(cli): introduce basic playwright CLI tool

[pavelfeldman]

pfeldman$ playwright⏎

Usage: playwright [options] [command]

Options:
  -V, --version                output the version number
  -b, --browser <browserType>  browser to use, one of cr, chromium, ff, firefox, wk, webkit (default: "chromium")
  --headless                   run in headless mode (default: false)
  --device <deviceName>        emulate device, for example  "iPhone 11"
  -h, --help                   display help for command

Commands:
  open [url]                   open page in browser specified via -b, --browser
  cr [url]                     open page in Chromium browser
  ff [url]                     open page in Firefox browser
  wk [url]                     open page in WebKit browser
  help [command]               display help for command

[dgozman]

Seem unused.

[pavelfeldman]

It will be!