Add test coverage for Redux generator directory isolation

Add test to verify that Redux installations do not create the
HelloWorld/ror_components directory that should only exist for
non-Redux installations.

This test prevents regression of issue #1821 where Redux generator
was incorrectly creating CSS files in the wrong directory structure.

The test runs in both JavaScript and TypeScript Redux contexts to
ensure complete coverage.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ihabadham

spec/react_on_rails/support/shared_examples/react_with_redux_generator_examples.rb

@@ -23,4 +23,9 @@
        app/javascript/src/HelloWorldApp/ror_components/HelloWorldApp.client.jsx
        app/javascript/src/HelloWorldApp/ror_components/HelloWorldApp.server.jsx].each { |file| assert_file(file) }
   end
+
+  it "does not create non-Redux HelloWorld ror_components directory" do
+    assert_no_directory "app/javascript/src/HelloWorld/ror_components"
+    assert_no_file "app/javascript/src/HelloWorld/ror_components/HelloWorld.module.css"
+  end
 end