Implement PHP CS Fixer and a coding standard to follow (#471)

* Create PHP CS Fixer config and add to CI workflow

* Run php cs fixer on project

* Add newline at end of file

* Update to use PHP CS Fixer v3

* Run v3 config on project

* Run seperate config in CI

app/Providers/BroadcastServiceProvider.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace Crater\Providers;
 
 use Illuminate\Support\Facades\Broadcast;