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/Models/Setting.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace Crater\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
@@ -15,6 +16,7 @@ class Setting extends Model
         if ($old) {
             $old->value = $setting;
             $old->save();
+
             return;
         }