Generate schema and live_view scaffold for records

1. Records are not yet tied to artists
2. The generated edit route, along with related functionality, may be
   deleted as I don't think it's gonna be needed. Leaving it included in
   the commit for reference.

lib/music_library_web/router.ex

@@ -18,6 +18,13 @@ defmodule MusicLibraryWeb.Router do
     pipe_through :browser
 
     get "/", PageController, :home
+
+    live "/records", RecordLive.Index, :index
+    live "/records/new", RecordLive.Index, :new
+    live "/records/:id/edit", RecordLive.Index, :edit
+
+    live "/records/:id", RecordLive.Show, :show
+    live "/records/:id/show/edit", RecordLive.Show, :edit
   end
 
   # Other scopes may use custom stacks.