feat: allow adding custom attributes to conversations from the SDK (#6782)

* feat: add conversation attributes method to sdk and widget app

* feat: add endpoints to update custom attributes

* refactor: update SDK api

* feat: add api and actions for conversation updates

* fix: error message

* test: custom attributes on conversations controller

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/controllers/api/v1/widget/conversations_controller.rb

@@ -65,6 +65,16 @@ class Api::V1::Widget::ConversationsController < Api::V1::Widget::BaseController
     head :ok
   end
 
+  def set_custom_attributes
+    conversation.update!(custom_attributes: permitted_params[:custom_attributes])
+  end
+
+  def destroy_custom_attributes
+    conversation.custom_attributes = conversation.custom_attributes.excluding(params[:custom_attribute])
+    conversation.save!
+    render json: conversation
+  end
+
   private
 
   def trigger_typing_event(event)