This PR does two things...
First, it adds a basic Tailwind configuration out of the box. This lets you start using Tailwind immediately without installing any starter kit. Useful if you just want to mess around or build things from scratch.
Second, it adds a composer run dev script, which starts php artisan serve, php artisan queue:listen --tries=1, php artisan pail (now a dev dependency by default), and npm run dev all in one command, with color coded output in the terminal using concurrently.
