Update for new starter kits

[jesseleite]

• [x] Add support for new starter kits.
  • [x] Polish cli messaging around starter kit license check. @jackmcdade?
• [x] Prompt to create super user at end of successful install.
• [x] Improve test coverage.
• [x] Lots of cleanup.

[jasonvarga]

Instead of a yaml file with the starter kits, can't we pull them from the marketplace?

[jackmcdade]

@jasonvarga Yes please. In fact, we should probably just point them to the Marketplace instead of trying to populate the list of them here. For now it's just a few, but in a few weeks/months there could be dozens. It'll be easier to cut it off now rather than later.

[jasonvarga]

So you want to remove this screen? Just make it a regular text input?

[jackmcdade]

Maybe? What options do we have that don't involve simply listing all possible kits?

[jasonvarga]

Some kind of search maybe... But that seems silly on the cli.

We could do autocompletion though.

[jackmcdade]

Maybe we do a prompt – like...

What do you want to do?
[0] Start with the default empty site
[1] Use a Starter Kit

And then if they pick [1]...

Enter the name of the Starter Kit (find them at statamic.com/stater-kits):
> autocomplete field

[jasonvarga]

We can do that.

[jackmcdade]

[jesseleite]

There we go! We can do the autocomplete later though.