Refactor and document output path (#28)

* Updated output path builder to better use yt-dlp variables

* Added UI explaining output template options

* Fixed outdated reference in dockerfile

lib/pinchflat_web.ex

@@ -88,6 +88,7 @@ defmodule PinchflatWeb do
       # Core UI components and translation
       import PinchflatWeb.Gettext
       import PinchflatWeb.CoreComponents
+      import PinchflatWeb.CustomComponents.TextComponents
       import PinchflatWeb.CustomComponents.TableComponents
       import PinchflatWeb.CustomComponents.ButtonComponents