Refactor dashboard

frontend/src/components/App.scss

frontend/src/components/atoms/NoticeItem/index.tsx

frontend/src/components/atoms/NoticeItem/style.module.scss

frontend/src/components/atoms/PersonCard/index.tsx

frontend/src/components/atoms/TutorCard/index.tsx

...d/src/components/molecules/DashboardButtonGroup/index.tsx

...nd/src/components/molecules/ResourcesFolderView/index.tsx

frontend/src/components/molecules/TutorCardGroup/index.tsx

frontend/src/components/organisms/LeftBarDashboard/index.tsx

frontend/src/components/organisms/LeftBarExams/index.tsx

frontend/src/components/organisms/NoticeBoard/index.tsx

frontend/src/components/pages/Dashboard/index.tsx

frontend/src/components/pages/Dashboard/style.module.scss

frontend/src/components/pages/Exams/index.tsx

frontend/src/components/pages/ModuleResources/index.tsx