Provide --browser and --browser-args for all commands that open the browser #3362
Description
ionic serve has a --browser option, but the following commands (which also open the browser) do not:
ionic docsionic link(for third-party git setup)ionic signup
Additionally, for each command that accepts a --browser option, accept a --browser-args option to pass additional options to the browser program. e.g. for Chrome, these are the available options: https://peter.sh/experiments/chromium-command-line-switches/