Update 'px' values to 'rem' in the organisms folder

src/components/organisms/BottomBar/BottomBarItem/index.tsx

src/components/organisms/BottomBar/index.tsx

src/components/organisms/BottomBar/style.module.scss

src/components/organisms/LeftBar/index.tsx

src/components/organisms/LeftBar/style.module.scss

src/components/organisms/LeftBarDashboard/index.tsx

src/components/organisms/LeftBarExams/index.tsx

src/components/organisms/LeftBarModule/index.tsx

src/components/organisms/LeftBarModuleList/index.tsx

...nts/organisms/NoticeBoard/components/NoticeItem/index.tsx

...nisms/NoticeBoard/components/NoticeItem/style.module.scss

src/components/organisms/RightBar/index.tsx

...ponents/organisms/TopBar/components/NavBarBrand/index.tsx

...organisms/TopBar/components/NavBarBrand/style.module.scss

...ents/organisms/TopBar/components/NavBarTabGroup/index.tsx

...anisms/TopBar/components/NavBarTabGroup/style.module.scss

...nents/organisms/TopBar/components/NavBarTabItem/index.tsx

src/components/organisms/TopBar/index.tsx

src/components/organisms/TopBar/style.module.scss