Added Rohini's UIs

src/app/add-event/add-event.component.html

src/app/add-event/add-event.component.scss

src/app/app.component.html

src/app/app.module.ts

src/app/contracts/eventDetails.ts

src/app/details/details.component.html

src/app/details/details.component.scss

src/app/details/details.component.spec.ts

src/app/details/details.component.ts

src/app/history/history.component.html

src/app/history/history.component.scss

src/app/history/history.component.spec.ts

src/app/history/history.component.ts

src/app/home-page/home-page.component.html

src/app/home-page/home-page.component.ts

src/app/listing/listing.component.html

src/app/listing/listing.component.scss

src/app/login/login.component.html

src/app/login/login.component.scss

src/app/login/login.component.ts