Add iron-session, html2canvas and shadcn/ui

Add listing of iron-session (a powerful and secure cookie-based session management tool), html2canvas (let's you take screenshots of your page using Javascript) and shadcn/ui (a plug and play component library for React with full customizability).

Author: crazymetakow

README.md

@@ -398,6 +398,7 @@ _Sketch input using Canvas or SVG_
 ### Screenshot
 
 - [urlbox](https://github.com/urlbox/urlbox-node) - Quickly generate screenshots, PDFs and other renders using the urlbox screenshot as a service API.
+- [html2canvas](https://github.com/niklasvh/html2canvas) - Take screenshots of any part of your web page using Javascript.
 
 ### Miscellaneous
 
@@ -697,6 +698,7 @@ _Set of components + responsive layout system_
 - [searchkit](https://github.com/searchkit/searchkit) - React UI components / widgets. The easiest way to build a great search experience with Elasticsearch.
 - [semantic-ui-react](https://github.com/Semantic-Org/Semantic-UI-React) - The official Semantic-UI-React integration.
 - [semi-design](https://github.com/DouyinFE/semi-design) - [demo/docs](https://semi.design/) - A modern, comprehensive, flexible design system.
+- [shadcn/ui](https://github.com/shadcn-ui/ui) - [demo](https://ui.shadcn.com/examples/mail) - [docs](https://ui.shadcn.com/docs) - Beautifully designed components that you can copy and paste into your apps. 
 - [shineout](https://github.com/sheinsight/shineout) - [demo](https://shine.wiki/1.4.x/en/components/GetStart) - Chinese-friendly set of components: form elements, navigation, table, tree, tree select drop-down etc.
 
 #### Material Design
@@ -1061,6 +1063,7 @@ _Internationalization / L10n / localization / translation_
 - [mozaik](https://github.com/plouc/mozaik) - Mozaïk is a tool based on nodejs / react / d3 / stylus to easily craft beautiful dashboards.
 - [react-blessed](https://github.com/Yomguithereal/react-blessed) - A react renderer for blessed.
 - [jsondiffpatch-react](https://github.com/bluepeter/jsondiffpatch-react) - JSON diffing.
+- [iron-session](https://github.com/vvo/iron-session) - Secure, stateless, and cookie-based session library. 
 
 ### Static Website Generator