Lint PHP code psr-12, add GH action

app/Mail/OpenFormMail.php

@@ -3,11 +3,11 @@
 namespace App\Mail;
 
 use Illuminate\Bus\Queueable;
-use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
 
 abstract class OpenFormMail extends Mailable
 {
-    use Queueable, SerializesModels;
+    use Queueable;
+    use SerializesModels;
 }