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/berrypod_web/controllers/page_controller_test.exs

@@ -0,0 +1,16 @@
+defmodule BerrypodWeb.PageControllerTest do
+  use BerrypodWeb.ConnCase, async: false
+
+  import Berrypod.AccountsFixtures
+
+  setup do
+    user_fixture()
+    {:ok, _} = Berrypod.Settings.set_site_live(true)
+    :ok
+  end
+
+  test "GET / renders the shop home page", %{conn: conn} do
+    conn = get(conn, ~p"/")
+    assert html_response(conn, 200) =~ "Original designs, printed on demand"
+  end
+end