Fix Credo Design (AliasUsage): add aliases in lib

Add module aliases at top and use short names instead of
fully qualified nested modules across lib/.

lib/mv_web/live/custom_field_live/index_component.ex

@@ -12,11 +12,13 @@ defmodule MvWeb.CustomFieldLive.IndexComponent do
   """
   use MvWeb, :live_component
 
+  alias MvWeb.Translations.FieldTypes
+
   require Logger
 
   @impl true
   def render(assigns) do
-    assigns = assign(assigns, :field_type_label, &MvWeb.Translations.FieldTypes.label/1)
+    assigns = assign(assigns, :field_type_label, &FieldTypes.label/1)
 
     ~H"""
     <div id={@id}>