Is it possible to create Style Books directly from a Client Extension?

Issue

Client Extensions can be created to modify the Liferay backend elements, like the Style Book.
The following feature is also being developed:
LPD-30204 Enhance Style Books behaviors across different scopes with multiple themes
LPD-6331 Enable design tokens management without Theme
Until these features are developed, the following options are also available:
- themes can still be used in order to customize the backend so that remains an option as well to do this task.
- samples can be found at this GitHub repository, but there may be some further samples of our Global Services members on their accounts:
  E.g. fabian-bouche-liferay/custom-font-client-extension
- related repository (may not be ready): liferay-course-backend-client-extensions
- copying and modifying the existing Button fragment, and adding the configuration using the fragment configuration.