frontend and backend dir added

frontend/.eslintrc.json

frontend/.gitignore

frontend/.gitkeep

frontend/README.md

frontend/app/components/assets/tü.png

frontend/app/components/sections/Footer.jsx

frontend/app/components/sections/Landingpage.jsx

frontend/app/components/sections/Navbar.jsx

frontend/app/components/utils/EnvironmentSwitch.jsx

frontend/app/components/utils/FileUpload.jsx

frontend/app/components/utils/UploadButton.jsx

frontend/app/favicon.ico

frontend/app/globals.css

frontend/app/layout.jsx

frontend/app/page.jsx

frontend/jsconfig.json

frontend/next.config.js

frontend/package-lock.json

frontend/package.json

frontend/postcss.config.js