rename project from SimpleshopTheme to Berrypod

All modules, configs, paths, and references updated.
836 tests pass, zero warnings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/support/fixtures/orders_fixtures.ex

@@ -1,11 +1,11 @@
-defmodule SimpleshopTheme.OrdersFixtures do
+defmodule Berrypod.OrdersFixtures do
   @moduledoc """
   Test helpers for creating orders.
   """
 
-  alias SimpleshopTheme.Orders
+  alias Berrypod.Orders
 
-  import SimpleshopTheme.ProductsFixtures
+  import Berrypod.ProductsFixtures
 
   def order_fixture(attrs \\ %{}) do
     attrs = Enum.into(attrs, %{})