Slack-Discord extra feature (#176)

* Enable Pro plan - WIP

* no pricing page if have no paid plans

* Set pricing ids in env

* views & submissions FREE for all

* extra param for env

* form password FREE for all

* Custom Code is PRO feature

* Replace codeinput prism with codemirror

* Better form Cleaning message

* Added risky user email spam protection

* fix form cleaning

* Custom SEO

* fix custom seo formcleaner

* Better webhooks

* Slack-Discord extra feature

* fix conflict

app/Http/Requests/UserFormRequest.php

@@ -43,6 +43,7 @@ abstract class UserFormRequest extends \Illuminate\Foundation\Http\FormRequest
             'use_captcha' => 'boolean',
             'slack_webhook_url' => 'url|nullable',
             'discord_webhook_url' => 'url|nullable',
+            'notification_settings' => 'nullable',
 
             // Customization
             'theme' => ['required',Rule::in(Form::THEMES)],