Load routes

[Larsklopstra]

It would be useful to include route loading as well, otherwise we still have to manually do:

class XXXProvider extends PackageServiceProvider
{
    public function configurePackage(Package $package): void
    {
        $package
            ->name('xxx')
            ->hasConfigFile()
            ->hasViews()
            ->hasCommand(xxx::class);
    }

    public function boot()
    {
        $this->loadRoutesFrom(__DIR__.'/../routes/web.php');
    }
}

[freekmurze]

Feel free to send a PR with tests and updated readme for this 👍

[Larsklopstra]

#5 😄