[WIP][FEAT]: Add server side, download and readers page

src/components/MainMenu/MainMenuSideBar.tsx

src/components/layout-pages/FooterPage.scss

src/components/layout-pages/FooterPage.tsx

src/components/layout-pages/MainContentContainer.jsx

src/pages/download-page/FileDownloadPage.jsx

src/pages/server-side/ServerSidePage.jsx

src/pages/server-side/ServerSidePage.tsx

src/pages/types-page/TypesPage.jsx

src/pages/utilities/FileReaderPage.tsx

src/pages/utilities/FileUploaderPage.tsx

src/routes/MainRouter.jsx

src/types/PageProps.ts