This PR adds git support to the Laravel installer. It'll allow users to immediately set up a Git repository with a fresh Laravel app committed into the Git history. Additionally, when using the --github flag, the installer will use GitHub's gh CLI tool under the hood to push the project to a private GitHub repo under the user's GitHub account. This'll make getting up an running with a new Laravel project that more easier.

Set up a new Laravel project and initialize a repo with the base skeleton committed:

laravel new my-app.com --git

The same as above but also automatically create a private GitHub repository:

laravel new my-app.com --github

The repo will then be available at github.com/<your-account/my-app.com.

The same as above but with Jetstream committed separately:

laravel new my-app.com --jet --github

Pass flags for gh repo create:

laravel new my-app.com --github="--public --team laravel"

The git flag assumes you've properly installed and configured Git. The github flag assumes you've properly installed the gh CLI tool and are authenticated with GitHub.