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/Http/Controllers/V1/General/SearchController.php

@@ -31,7 +31,7 @@ class SearchController extends Controller
 
         return response()->json([
             'customers' => $customers,
-            'users' => $users ?? []
+            'users' => $users ?? [],
         ]);
     }
 }