add aos to html project code example

Example: aos library slow animation angular

$ npm install aos --save
//In angular.json
styles: [... "node_modules/<your-site>/aos/dist/aos.css"]
//In component.ts
import * as AOS from 'aos';

ngOnInit() {
    AOS.init();
 }

//In component.html
<div data-aos="fade-left"></div>