Show record count by format in stats dashboard

lib/music_library_web/controllers/stats_html.ex

@@ -2,4 +2,11 @@ defmodule MusicLibraryWeb.StatsHTML do
   use MusicLibraryWeb, :html
 
   embed_templates "stats_html/*"
+
+  defp format_records_count(records_count_by_format) do
+    Enum.map(records_count_by_format, fn {format, count} ->
+      Integer.to_string(count) <> " " <> Atom.to_string(format)
+    end)
+    |> Enum.join(", ")
+  end
 end