improvement: add AshPostgres.Tsvector

Author: zachdaniel

lib/types/tsvector.ex

@@ -0,0 +1,12 @@
+defmodule AshPostgres.Tsvector do
+  @moduledoc """
+  A thin wrapper around `:string` for working with tsvector types in calculations.
+
+  A calculation of this type cannot be selected, but may be used in calculations.
+  """
+
+  use Ash.Type.NewType, subtype_of: :term
+
+  @impl true
+  def storage_type(_), do: :tsvector
+end