Moves page files from verbose `*_page` named directories to simpler, more organized paths.
This includes:
- Renaming top-level pages (e.g., `home_page` to `home`, `login_page` to `login`).
- Nesting related pages under common directories (e.g., `product_form_page` and `product_list_page` are now under `product/`).
The update improves project organization, reduces verbosity in file paths, and enhances overall maintainability.
