namespace contains a path ".../pages", that is not a directory.

Problem/Motivation

The "@rain_theme" namespace contains a path, "themes/contrib/rain_theme/src/stories/pages", that is not a directory.
The "@nimbus_theme" namespace contains a path, "profiles/contrib/rain_demo/themes/nimbus_theme/src/stories/pages", that is not a directory.

Steps to reproduce

Install the rain_demo profile

Proposed resolution

Remove the "- src/stories/pages" in the theme generator and resulting themes.
https://github.com/mediacurrent/theme_generator_9/blob/main/generators/a...