Refactor app in to its own slice

slices/main/views/posts/top_tracks.rb

@@ -0,0 +1,21 @@
+module Main
+  module Views
+    module Posts
+      class TopTracks< Main::View
+        config.layout = false
+
+        expose :name do |track:|
+          track.name
+        end
+
+        expose :artist do |track:|
+          track.artist
+        end
+
+        expose :url do |track:|
+          track.url
+        end
+      end
+    end
+  end
+end