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/helpers.php

@@ -15,6 +15,6 @@ if (!function_exists('front_url')) {
 if (!function_exists('pricing_enabled')) {
     function pricing_enabled(): bool
     {
-        return App::environment() !== 'testing' && !is_null(config('cashier.key'));
+        return !is_null(config('cashier.key'));
     }
 }