Feature Request: Option to install npm dependencies?

[duncanmcclean]

Like how the CLI asks if you want to create a user when creating a fresh site with the Statamic CLI, it could be nice if it also asked you if you wanted it to run npm install for you.

Feel free to transfer this to statamic/ideas if that's a better place for this kind of thing - wasn't sure as it's CLI related, not Core related (I assume anyways).