Integrate SCSS Design System
Created by: google-labs-jules[bot]
This change integrates a new SCSS-based design system into the frontend application. It adds the necessary dependencies, converts the main stylesheet to SCSS, and incorporates the new design system files. Unresolved imports to missing stories and font files have been commented out to allow the application to compile with the new base styles.
PR created automatically by Jules for task 3932572247225145501 started by @Edouard-Legoupil