Add name argument to RestartCommand

[olumby]

I had to manually restart Vite a bunch of times earlier whilst debugging an issue. I found myself using the up-arrow key to re-run porter restart and forgetting I had to interact with it.

This pull request add an optional argument to the porter restart command. Passing the name argument in the format group:name will restart the matching service, for example:

porter restart myproject:myproject-vite

[PhiloNL]

Awesome, thanks!