[Enhancement] Add sorting, pagination, and new attributes to sources index table (#510)

* WIP - started improving handling of sorting for sources index table

* WIP - Added UI to table to indicate sort column and direction

* Refactored toggle liveview into a livecomponent

* Added sorting for all table attrs

* Added pagination to the sources table

* Added tests for updated liveviews and live components

* Add tests for new helper methods

* Added fancy new CSS to my sources table

* Added size to sources table

* Adds relative div to ensure that sorting arrow doesn't run away

* Fixed da tests

lib/pinchflat_web/controllers/pages/page_html.ex

@@ -1,23 +1,5 @@
 defmodule PinchflatWeb.Pages.PageHTML do
   use PinchflatWeb, :html
 
-  alias Pinchflat.Utils.NumberUtils
-
   embed_templates "page_html/*"
-
-  attr :media_filesize, :integer, required: true
-
-  def readable_media_filesize(assigns) do
-    {num, suffix} = NumberUtils.human_byte_size(assigns.media_filesize, precision: 2)
-
-    assigns =
-      Map.merge(assigns, %{
-        num: num,
-        suffix: suffix
-      })
-
-    ~H"""
-    <.localized_number number={@num} /> {@suffix}
-    """
-  end
 end