feat: Disable attachments and emoji picker in the web widget (#1102)

Signed-off-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/views/api/v1/models/_inbox.json.jbuilder

@@ -14,3 +14,4 @@ json.enable_auto_assignment resource.enable_auto_assignment
 json.web_widget_script resource.channel.try(:web_widget_script)
 json.forward_to_address resource.channel.try(:forward_to_address)
 json.phone_number resource.channel.try(:phone_number)
+json.selected_feature_flags resource.channel.try(:selected_feature_flags)

app/views/widgets/show.html.erb

@@ -17,6 +17,7 @@
         welcomeTagline: '<%= @web_widget.welcome_tagline %>',
         welcomeTitle: '<%= @web_widget.welcome_title %>',
         widgetColor: '<%= @web_widget.widget_color %>',
+        enabledFeatures: <%= @web_widget.selected_feature_flags.to_json.html_safe %>,
         enabledLanguages: <%= available_locales_with_name.to_json.html_safe %>,
       }
       window.chatwootWidgetDefaults = {