docs: add ng-simple-sidebar (#1065)

README.md

@@ -1361,6 +1361,7 @@ to simplify usage and allow quick customization.
 * [ngx-flexbox](https://github.com/philipibovo/ngx-flexbox) - Designed as an alternative to [@angular/flexlayout](https://github.com/angular/flex-layout), ngx-flexbox provides Angular developers with component layout features using a custom layout API, media query observables, and injected DOM flexbox-2016 CSS stylings.
 * [ngx-van](https://github.com/otodockal/ngx-van) - Tiny replacement for HTML nav element with mobile side nav menu built-in. Good old nav element on desktop, sliding side nav on mobile. No duplication.
 * [ngx-swipe-menu](https://github.com/charlesschaefer/ngx-swipe-menu) - A component to create "swipe left to 'action'" experiences.
+* [ng-simple-sidebar](https://github.com/secanis/ng-simple-sidebar) - A simple Angular component to generate a sidebar with a hamburger menu.
 
 #### Loaders