Add ex_slop, configure it, run it and fix issues

lib/music_library_web/components/layouts.ex

@@ -1,13 +1,5 @@
 defmodule MusicLibraryWeb.Layouts do
-  @moduledoc """
-  This module holds different layouts used by your application.
-
-  See the `layouts` directory for all templates available.
-  The "root" layout is a skeleton rendered as part of the
-  application router. The "app" layout is set as the default
-  layout on both `use MusicLibraryWeb, :controller` and
-  `use MusicLibraryWeb, :live_view`.
-  """
+  @moduledoc false
   use MusicLibraryWeb, :html
 
   import MusicLibraryWeb.UniversalSearchLive.Index, only: [universal_search_trigger: 1]