Misc messaging improvements

Improve messaging and error output, informing the user as early as possible in the install process...

[x] Notify when user is running older CLI tool version.
- This doesn't prevent install, but will show up at the top and bottom of install output.
[x] Handle missing composer auth if starter kit is hosted on github.
- This does prevent install, but only if a github hosted starter kit is detected.
[x] Explain single-site starter kit license for paid kids.
- Ask user to confirm that they understand it's a single-use thing, in order to prevent unnecessary support questions and tickets.
[x] Improve UX when running non-interactively.
[x] Update dependencies to remove certain PHP 8.x deprecations in output.

Do not merge until https://github.com/statamic/cms/pull/5338 is tagged in 3.2!

Closes #43 Closes #44

statamic / cli