Add a prototype of a code viewer
user
```ruby
 'universal_ast'

module Hivemind
  class CodeViewer
    def initialize(tree)
      @tree = tree
    end

    def view_as(query)
      hierarchy = QueryAnalyzer.parse(query)
      rebuild_tree(hierarchy)
    end

    def rebuild_tree(hierarchy)
      if hierarchy[0].type == @code_view.hierarchy[0].type
        # only sorting maybe
        # and sorting still not supported
        @tree
      else
        # method > code
        new_tree = UniversalAST::Image.new([])
        top = {}
        if hierarchy[0].type == :method
          @tree.statements.each do |statement|
            statement.methods.each do |method|
              top[method.method_name.value] ||= {}
              top[method.method_name.value][statement.class_name.value] = [args, method.body]
            end
          end
        else
           @tree.statements.each do |statement|
             statement.body.each do |method|
               top[method.class_name.value] ||= {}
               top[method.class_name.value][statement.method_name.value] = [args, method.body]
             end
           end
        end
      end
    end
  end
end
```
assistant