Multi level menu component

What does this PR do and why?

Describe in detail what your merge request does and why.

This PR adds in a multi level menu component to the sidebar component to display multi level menus. NOTE: Currently just working on click of the multi level menu button/label

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How to set up and validate locally

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Open up `layouts/prpjects.html.erb
Replace the render section.with_item for the Settings link with the below

<%= render section.with_multi_level_menu(title: "Settings") do |mm| %>
            <% if allowed_to?(:update?, @project) %>
              <% mm.with_menu_item(
                url: project_edit_path(@project),
                icon: "cog_6_tooth",
                label: "General",
                selected: @current_page == t(:"projects.sidebar.settings").downcase
              ) %>
            <% end %>
            <% mm.with_menu_item(
              url: project_edit_path(@project),
              icon: "cog_6_tooth",
              label: "Bot Accounts",
              selected: @current_page == t(:"projects.sidebar.settings").downcase
            ) %>
          <% end %>
        <% end %>

You should see the Settings sidebar menu item has a downward facing caret
Click the Settings item and you should see a menu expand below it to show the General and Bot Accounts links

PR acceptance checklist

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[x] I have evaluated the PR acceptance checklist for this PR.

phac-nml / irida-next