Introduces _theme-colors.scss with generated palettes and integrates them into custom-theme.scss for both light and dark themes. Removes stepper icon styles from performance-info.component.css and moves them to custom-theme.scss for better maintainability and consistency.
Introduces error state management in LoadingService, displays error bar and snackbar notifications in the UI, and updates ScheduleComponent to use the new error handling. Also adds custom theming for error snackbar and progress bar.
Integrated @angular/material and @angular/cdk into the project and created a custom theme using SCSS. Updated angular.json to include the new theme, added Roboto and Material Icons fonts in index.html, and improved global styles for Material compatibility.
