[Bugfix] Partially revert custom codec selection (#279)

* Removed and re-added codec preference columns

* Removed custom codec work from download options builder

* Updated settings UI

* Made codec preferences non-optional fields

priv/repo/migrations/20240603230512_refactor_codec_preferences.exs

@@ -0,0 +1,15 @@
+defmodule Pinchflat.Repo.Migrations.RefactorCodecPreferences do
+  use Ecto.Migration
+
+  def change do
+    alter table(:settings) do
+      remove :video_codec_preference, {:array, :string}, default: []
+      remove :audio_codec_preference, {:array, :string}, default: []
+    end
+
+    alter table(:settings) do
+      add :video_codec_preference, :string, default: "avc", null: false
+      add :audio_codec_preference, :string, default: "m4a", null: false
+    end
+  end
+end