Refactor - constistency, make stimulus_controllers accept string inst…

…ead of array

In the implementation for resources we're using string. I'm not convinced that this is a right approach, but I'm applying same convention here.

lib/avo/concerns/has_action_stimulus_controllers.rb

@@ -4,11 +4,11 @@ module HasActionStimulusControllers
       extend ActiveSupport::Concern
 
       included do
-        class_attribute :stimulus_controllers, default: []
+        class_attribute :stimulus_controllers, default: ""
       end
 
       def get_stimulus_controllers
-        self.class.stimulus_controllers.join " "
+        self.class.stimulus_controllers
       end
     end
   end

spec/dummy/app/avo/actions/show_current_time.rb

@@ -1,7 +1,7 @@
 class ShowCurrentTime < Avo::BaseAction
   self.name = "Show current time"
   self.standalone = true
-  self.stimulus_controllers = ["city-in-country"]
+  self.stimulus_controllers = "city-in-country"
 
   field :country,
     as: :select,