Copy Site View endpoint in graphql
user
```ruby
module Mutations
  class CopySiteView < BaseMutation
    field :site_view, Types::SiteViewType, null: true
    field :errors, [String], null: true

    argument :name, String, required: true
    argument :url, String, required: false
    argument :description, String, required: false
    argument :default, Boolean, required: true
    argument :site_id, Integer, required: true
    argument :site_view_id, Integer, required: true

    def resolve(args)
      site = Site.find_by(id: args[:site_id])
      if site.nil?
        return   { site_view: nil, errors: ["Site not found"] }
      end
      original_view = site.site_views.find_by(id: args[:site_view_id] )
      view = site.site_views.new(name:args[:name], default: args[:default], url: args[:url], description: args[:description], updates:original_view.updates)
      if view.save
        { site_view: view, errors: nil }
      else
        { site_view: nil, errors: view.errors.full_messages }
      end
    end

    def authorized?(args)
      site = Site.find_by(id: args[:site_id])
      return false if site.blank?

      current_user.present? && (
        current_user.has_role?(:admin) ||
        current_user.has_role?(:site_owner, site) ||
        current_user.has_role?(:site_editor, site)
      )
    end
  end
end
```
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