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.

test/support/fixtures/records_fixtures.ex

@@ -0,0 +1,25 @@
+defmodule MusicLibrary.RecordsFixtures do
+  @moduledoc """
+  This module defines test helpers for creating
+  entities via the `MusicLibrary.Records` context.
+  """
+
+  @doc """
+  Generate a record.
+  """
+  def record_fixture(attrs \\ %{}) do
+    {:ok, record} =
+      attrs
+      |> Enum.into(%{
+        genres: ["option1", "option2"],
+        image: "some image",
+        musicbrainz_id: "7488a646-e31f-11e4-aace-600308960662",
+        title: "some title",
+        type: :album,
+        year: 42
+      })
+      |> MusicLibrary.Records.create_record()
+
+    record
+  end
+end