Custom SMTP Settings (#561)

* Custom SMTP Settings

* Fix lint

* Custom SMTP add in Pricing plan

* Allow reset email settings

* improve custom SMTP using seprate abstract class

* test case for custom SMTP

* fix test case

* UI improvement

* add CASHIER_KEY in phpunit for testcase

* Attempt to fix tests

* Run pint and attempt to fix cache tests

* Fix user management tests

* Fix code linters

* Merged main & fix linting

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Co-authored-by: Julien Nahum <julien@nahum.net>

api/app/Mail/Forms/SubmissionConfirmationMail.php

@@ -54,7 +54,7 @@ class SubmissionConfirmationMail extends OpenFormMail implements ShouldQueue
 
     private function getFromEmail()
     {
-        if(config('app.self_hosted')) {
+        if (config('app.self_hosted')) {
             return config('mail.from.address');
         }