- Added THEME.md documentation detailing the theming system, including usage, service methods, and CSS variables reference.
- Created theme.scss with SCSS mixins for applying OpenVidu themes and integrating with Angular Material.
- Introduced theme.model.ts to define theme modes and variables.
- Developed theme.service.ts to manage theme switching, variable updates, and system theme detection.
- Updated public-api.ts to export new theme model and service.
- Enhanced styles.scss to incorporate OpenVidu theme integration with Angular Material.
- Added support for responsive theme detection based on system preferences.
