update folder structure

frontend/.gitignore

frontend/.vscode/extensions.json

frontend/.vscode/launch.json

frontend/.vscode/tasks.json

frontend/README.md

frontend/angular.json

frontend/package-lock.json

frontend/package.json

frontend/src/app/app.component.html

frontend/src/app/app.component.scss

frontend/src/app/app.component.spec.ts

frontend/src/app/app.component.ts

frontend/src/app/app.config.ts

frontend/src/app/app.routes.ts

frontend/src/assets/.gitkeep

frontend/src/favicon.ico

frontend/src/index.html

frontend/src/main.ts

frontend/src/styles.scss

frontend/tsconfig.app.json